| 1 | Science | 7,867 | 1.2M | 18 | 11 |
| 2 | Physics | 6,647 | 1.1M | 38 | 11 |
| 3 | Biology | 7,840 | 996.6K | 14 | 12 |
| 4 | Natural history | 1,926 | 608.8K | 14 | 10 |
| 5 | Cytology | 2,868 | 523.8K | 9 | 8 |
| 6 | Cell Biology | 2,396 | 515.4K | 12 | 8 |
| 7 | Molecular Biology | 4,431 | 501.5K | 14 | 9 |
| 8 | Medicine | 4,904 | 441.7K | 29 | 21 |
| 9 | Biochemistry | 5,828 | 413.8K | 20 | 10 |
| 10 | Neurology | 4,002 | 409.2K | 21 | 14 |
| 11 | Virology | 1,255 | 341.0K | 21 | 9 |
| 12 | Chemistry | 3,867 | 320.3K | 55 | 34 |
| 13 | Microbiology | 2,256 | 207.1K | 25 | 15 |
| 14 | Psychiatry | 1,862 | 164.3K | 22 | 15 |
| 15 | Research | 2,964 | 153.3K | 34 | 22 |
| 16 | Genetics | 1,333 | 145.5K | 30 | 29 |
| 17 | Biotechnology | 919 | 145.2K | 62 | 8 |
| 18 | Oceanography | 2,030 | 135.1K | 3 | 2 |
| 19 | Geophysics | 2,587 | 134.5K | 12 | 8 |
| 20 | Neurophysiology | 1,460 | 127.8K | 12 | 16 |
| 21 | Bioengineering | 708 | 125.5K | 34 | 8 |
| 22 | Psychophysiology | 1,553 | 124.6K | 7 | 5 |
| 23 | Astrophysics | 1,600 | 120.1K | 70 | 72 |
| 24 | Immunology | 1,098 | 116.3K | 32 | 18 |
| 25 | Astronomy | 1,533 | 108.8K | 72 | 64 |
| 26 | Immunity | 560 | 105.1K | 18 | 14 |
| 27 | Psychology | 1,234 | 103.1K | 44 | 22 |
| 28 | Biophysics | 2,020 | 97.2K | 22 | 20 |
| 29 | Developmental Biology | 986 | 90.9K | 12 | 11 |
| 30 | Neurons | 428 | 90.6K | 10 | 13 |
| 31 | Biochemical Engineering | 275 | 89.5K | 126 | 10 |
| 32 | Nanotechnology | 1,062 | 87.7K | 87 | 56 |
| 33 | Materials | 1,064 | 86.2K | 150 | 87 |
| 34 | Human genetics | 468 | 85.7K | 51 | 67 |
| 35 | Physiology | 1,401 | 84.2K | 26 | 16 |
| 36 | Ecology | 1,013 | 82.4K | 109 | 81 |
| 37 | Solid State Physics | 1,672 | 81.8K | 45 | 33 |
| 38 | Endocrinology | 1,120 | 81.7K | 32 | 26 |
| 39 | Condensed Matter | 1,610 | 79.9K | 43 | 36 |
| 40 | Computational Biology | 715 | 77.8K | 6 | 7 |
| 41 | Spectrum analysis | 1,227 | 77.0K | 61 | 63 |
| 42 | Marine Biology | 978 | 76.3K | 5 | 2 |
| 43 | Nuclear Physics | 1,340 | 75.3K | 153 | 79 |
| 44 | Nervous system | 432 | 73.9K | 35 | 13 |
| 45 | Pharmacology | 1,090 | 73.3K | 73 | 19 |
| 46 | Geology | 975 | 72.0K | 29 | 14 |
| 47 | Metabolic diseases | 627 | 67.7K | 27 | 15 |
| 48 | Cancer | 726 | 67.2K | 56 | 28 |
| 49 | Mental Disorders | 807 | 66.8K | 27 | 17 |
| 50 | Public Health | 1,137 | 65.8K | 63 | 48 |
| 51 | Surgery | 313 | 64.8K | 53 | 28 |
| 52 | Bioinformatics | 379 | 62.3K | 12 | 7 |
| 53 | genome | 334 | 60.2K | 12 | 11 |
| 54 | Economics | 584 | 58.7K | 79 | 26 |
| 55 | Meteorology | 925 | 56.7K | 20 | 19 |
| 56 | Liver diseases | 392 | 56.3K | 15 | 8 |
| 57 | Pediatrics | 927 | 55.9K | 36 | 35 |
| 58 | Planets | 986 | 55.8K | 11 | 11 |
| 59 | Environment | 824 | 55.4K | 51 | 66 |
| 60 | Biomedical Engineering | 903 | 55.3K | 32 | 13 |
| 61 | Cytogenetics | 365 | 54.8K | 23 | 11 |
| 62 | Cardiovascular system | 505 | 53.9K | 25 | 20 |
| 63 | Developmental Genetics | 290 | 53.2K | 6 | 5 |
| 63 | Psychopharmacology | 608 | 53.2K | 10 | 8 |
| 65 | Bacteriology | 385 | 53.1K | 34 | 17 |
| 66 | Cell differentiation | 444 | 52.8K | 21 | 14 |
| 67 | Brain | 837 | 52.6K | 21 | 20 |
| 68 | Metabolism | 666 | 52.5K | 37 | 28 |
| 69 | Immune system | 183 | 51.6K | 24 | 12 |
| 70 | Neurobiology | 720 | 51.4K | 8 | 10 |
| 71 | Hematology | 943 | 50.8K | 56 | 43 |
| 72 | Cognition | 569 | 50.4K | 6 | 3 |
| 73 | Materials Science | 726 | 49.4K | 122 | 69 |
| 74 | Artificial Intelligence | 350 | 49.2K | 75 | 16 |
| 75 | Genetic regulation | 278 | 48.7K | 10 | 8 |
| 76 | Medical genetics | 694 | 46.1K | 52 | 58 |
| 77 | Gene expression regulation | 235 | 45.9K | 11 | 6 |
| 78 | Neuropsychology | 794 | 44.5K | 6 | 3 |
| 79 | viral genetics | 190 | 44.4K | 8 | 5 |
| 80 | Geochemistry | 662 | 44.1K | 22 | 16 |
| 81 | Psycholinguistics | 326 | 43.7K | 5 | 2 |
| 82 | Statistical physics | 844 | 43.7K | 49 | 26 |
| 83 | Cognitive neuroscience | 367 | 43.0K | 5 | 7 |
| 84 | Behavior | 900 | 42.5K | 24 | 36 |
| 85 | Microbial Ecology | 533 | 42.2K | 14 | 18 |
| 86 | Information Theory | 539 | 41.6K | 9 | 11 |
| 87 | Econometrics | 261 | 41.1K | 9 | 7 |
| 88 | Embryology | 441 | 40.6K | 20 | 18 |
| 89 | Growth | 389 | 40.0K | 19 | 20 |
| 90 | Biocompatible Materials | 574 | 40.0K | 87 | 68 |
| 91 | Memory | 594 | 39.5K | 20 | 9 |
| 92 | Pharmaceutical Chemistry | 637 | 39.1K | 41 | 22 |
| 93 | Alzheimer's disease | 700 | 39.1K | 16 | 11 |
| 94 | Telecommunication | 708 | 39.0K | 17 | 25 |
| 95 | Molecular structure | 296 | 37.7K | 20 | 7 |
| 96 | Anatomy | 418 | 36.8K | 24 | 19 |
| 97 | Allergy | 305 | 36.6K | 20 | 16 |
| 98 | Computational Chemistry | 47 | 36.4K | 18 | 5 |
| 99 | Automation | 471 | 36.4K | 23 | 20 |
| 100 | Climatology | 550 | 36.2K | 16 | 14 |
| 101 | Dementia | 617 | 35.1K | 17 | 12 |
| 102 | cell physiology | 445 | 34.9K | 9 | 7 |
| 103 | Earth Sciences | 328 | 34.7K | 72 | 18 |
| 104 | United States | 918 | 34.5K | 110 | 78 |
| 105 | Immunotherapy | 196 | 34.2K | 48 | 11 |
| 106 | nucleic acids | 311 | 34.0K | 30 | 35 |
| 107 | Hypertension | 396 | 33.9K | 32 | 25 |
| 108 | Meteorites | 380 | 33.9K | 16 | 12 |
| 109 | Mental illness | 517 | 33.5K | 22 | 23 |
| 110 | Optics | 729 | 33.2K | 128 | 40 |
| 111 | Marine Meteorology | 514 | 32.6K | 4 | 3 |
| 112 | biological evolution | 323 | 32.6K | 43 | 38 |
| 113 | Botany | 369 | 32.4K | 190 | 102 |
| 114 | Oncology | 279 | 32.2K | 55 | 34 |
| 115 | Schizophrenia | 465 | 31.8K | 7 | 6 |
| 116 | Sleep Disorders | 441 | 31.4K | 16 | 6 |
| 117 | Perception | 647 | 31.3K | 17 | 10 |
| 118 | Atmospheric Physics | 540 | 31.1K | 22 | 27 |
| 119 | Respiration | 598 | 30.3K | 3 | 5 |
| 120 | Sleep | 436 | 30.1K | 15 | 7 |
| 121 | Quantum Gravity | 551 | 30.1K | 93 | 66 |
| 122 | Ophthalmology | 596 | 29.8K | 17 | 14 |
| 123 | nanoscience | 322 | 29.8K | 95 | 58 |
| 124 | Information Systems | 75 | 29.7K | 55 | 1 |
| 125 | miniaturization | 269 | 29.7K | 42 | 32 |
| 126 | Electronics | 445 | 29.6K | 108 | 36 |
| 127 | Plant cells | 163 | 29.0K | 69 | 43 |
| 128 | human behavior | 364 | 28.2K | 50 | 45 |
| 129 | Animal Behavior | 424 | 27.9K | 29 | 26 |
| 130 | Diabetes | 394 | 27.2K | 33 | 32 |
| 131 | proteins | 490 | 27.2K | 8 | 10 |
| 132 | Pediatric Neurology | 136 | 27.0K | 44 | 22 |
| 133 | Neural circuitry | 98 | 26.9K | 107 | 3 |
| 134 | preventive medicine | 353 | 26.4K | 12 | 10 |
| 135 | Neurochemistry | 454 | 26.3K | 36 | 33 |
| 136 | viruses | 350 | 25.8K | 39 | 40 |
| 137 | Molecular evolution | 200 | 25.7K | 19 | 19 |
| 138 | Nonlinear Dynamics | 518 | 25.7K | 17 | 9 |
| 139 | Evolution | 285 | 25.4K | 39 | 30 |
| 140 | arthritis | 291 | 25.2K | 22 | 15 |
| 141 | Cell metabolism | 107 | 25.2K | 8 | 10 |
| 142 | Homeostasis | 107 | 25.1K | 8 | 10 |
| 143 | Signal Processing | 525 | 25.0K | 49 | 57 |
| 144 | Microelectronics | 284 | 25.0K | 49 | 34 |
| 145 | Diabetes mellitus | 349 | 24.9K | 36 | 35 |
| 146 | Host-parasite interactions | 211 | 24.7K | 23 | 15 |
| 147 | Health Policy | 293 | 24.7K | 57 | 9 |
| 148 | Pathology | 339 | 24.6K | 52 | 28 |
| 149 | Critical Care Medicine | 183 | 24.5K | 70 | 23 |
| 149 | Metallurgy | 238 | 24.5K | 114 | 36 |
| 151 | Critical Care | 183 | 24.5K | 69 | 22 |
| 152 | Toxicology | 482 | 24.2K | 98 | 55 |
| 153 | Linguistics | 221 | 24.2K | 22 | 2 |
| 154 | Atmospheric Chemistry | 317 | 24.1K | 30 | 29 |
| 155 | Epidemiology | 484 | 23.8K | 79 | 75 |
| 156 | Political Science | 304 | 23.2K | 37 | 11 |
| 157 | Nuclear Fusion | 648 | 23.2K | 19 | 10 |
| 158 | Mathematics | 1,149 | 22.6K | 84 | 54 |
| 159 | natural products | 251 | 22.3K | 14 | 2 |
| 160 | Sociology | 359 | 22.2K | 74 | 42 |
| 161 | Metals | 185 | 21.7K | 137 | 38 |
| 162 | Medical Microbiology | 224 | 21.7K | 77 | 34 |
| 163 | Analytical Chemistry | 337 | 21.7K | 199 | 77 |
| 164 | Obstetrics | 499 | 21.5K | 58 | 41 |
| 165 | Lipids | 168 | 21.3K | 18 | 4 |
| 166 | Systems Biology | 359 | 21.1K | 4 | 1 |
| 167 | Dermatology | 473 | 20.9K | 33 | 21 |
| 168 | Plants | 129 | 20.7K | 133 | 52 |
| 169 | gene mapping | 272 | 20.3K | 29 | 35 |
| 170 | Environmental Health | 452 | 20.3K | 160 | 187 |
| 171 | behavioral medicine | 298 | 20.1K | 9 | 9 |
| 172 | Data Mining | 99 | 20.0K | 34 | 6 |
| 173 | Medical Physics | 509 | 19.9K | 23 | 24 |
| 174 | Pollution | 383 | 19.6K | 212 | 255 |
| 175 | Cell death | 110 | 19.5K | 66 | 21 |
| 176 | Therapeutics | 242 | 19.1K | 42 | 25 |
| 177 | data collection | 77 | 19.0K | 20 | 5 |
| 178 | Health promotion | 310 | 18.9K | 16 | 15 |
| 179 | Mental Health | 229 | 18.8K | 27 | 4 |
| 180 | Biomechanics | 249 | 18.6K | 16 | 7 |
| 181 | Rheumatology | 213 | 18.5K | 28 | 13 |
| 182 | Engineering | 374 | 18.4K | 84 | 26 |
| 183 | Medical innovations | 181 | 18.3K | 17 | 17 |
| 184 | protein | 287 | 18.3K | 7 | 10 |
| 185 | Virulence | 181 | 18.0K | 21 | 13 |
| 186 | Urology | 561 | 18.0K | 38 | 46 |
| 187 | Analytical Biochemistry | 182 | 18.0K | 15 | 7 |
| 188 | Intelligence | 79 | 17.2K | 4 | 1 |
| 189 | Geriatrics | 639 | 17.1K | 44 | 71 |
| 190 | drug development | 169 | 17.0K | 20 | 18 |
| 191 | Child Development | 369 | 16.8K | 37 | 58 |
| 192 | Nutrition | 393 | 16.7K | 129 | 135 |
| 193 | Child | 476 | 16.7K | 38 | 30 |
| 194 | Clinical Chemistry | 390 | 16.7K | 47 | 47 |
| 195 | Genomics | 403 | 16.5K | 54 | 65 |
| 196 | Aging | 547 | 16.5K | 38 | 62 |
| 197 | Microwaves | 285 | 16.4K | 29 | 5 |
| 198 | alcoholism | 462 | 16.3K | 24 | 25 |
| 199 | Environmental Microbiology | 143 | 16.3K | 14 | 4 |
| 200 | drug therapy | 376 | 16.3K | 45 | 42 |
| 201 | Medical Laboratory Science | 189 | 16.1K | 56 | 26 |
| 202 | Radio | 175 | 16.0K | 72 | 36 |
| 203 | plant molecular biology | 108 | 15.9K | 131 | 68 |
| 204 | Medical Oncology | 389 | 15.9K | 41 | 55 |
| 205 | Ethology | 220 | 15.8K | 58 | 42 |
| 206 | Visual Perception | 453 | 15.8K | 23 | 28 |
| 207 | Attention | 407 | 15.6K | 33 | 30 |
| 208 | Cognitive Science | 157 | 15.5K | 26 | 30 |
| 209 | Fluid Mechanics | 229 | 15.5K | 37 | 11 |
| 210 | Statistics | 272 | 15.5K | 98 | 69 |
| 211 | pain | 213 | 15.5K | 38 | 36 |
| 212 | Image Processing | 260 | 15.3K | 72 | 62 |
| 213 | mental health policy | 77 | 15.1K | 4 | 1 |
| 214 | Microorganisms | 81 | 15.0K | 36 | 4 |
| 215 | Mathematical Physics | 224 | 15.0K | 148 | 58 |
| 216 | Child psychology | 355 | 14.9K | 40 | 65 |
| 217 | Obesity | 377 | 14.8K | 37 | 44 |
| 218 | Oncogenes | 185 | 14.7K | 30 | 37 |
| 219 | Combustion | 348 | 14.7K | 21 | 16 |
| 220 | System analysis | 193 | 14.7K | 55 | 11 |
| 221 | computer networks | 246 | 14.4K | 58 | 23 |
| 222 | Water | 158 | 14.2K | 145 | 85 |
| 223 | Learning | 292 | 14.0K | 8 | 20 |
| 224 | biological factors | 115 | 14.0K | 47 | 2 |
| 225 | Computer Graphics | 175 | 13.9K | 77 | 40 |
| 226 | Genetic engineering | 204 | 13.8K | 37 | 25 |
| 227 | transport vesicles | 14 | 13.0K | 39 | 52 |
| 228 | Anxiety Disorders | 164 | 12.9K | 7 | 8 |
| 229 | Anxiety | 163 | 12.9K | 7 | 8 |
| 230 | Renewable Energy Sources | 92 | 12.9K | 223 | 88 |
| 231 | Bioorganic chemistry | 295 | 12.8K | 50 | 49 |
| 232 | Histology | 199 | 12.5K | 38 | 35 |
| 233 | Radiobiology | 324 | 12.4K | 35 | 51 |
| 234 | Cerebral cortex | 163 | 12.3K | 23 | 21 |
| 235 | Developmental Psychology | 180 | 12.3K | 34 | 27 |
| 236 | DNA polymerases | 97 | 12.1K | 13 | 24 |
| 237 | diseases | 21 | 12.1K | 34 | 26 |
| 238 | Bacterial infections | 79 | 12.0K | 28 | 17 |
| 239 | Health | 292 | 12.0K | 51 | 35 |
| 240 | Diet | 225 | 12.0K | 63 | 79 |
| 241 | mycoses | 80 | 11.8K | 18 | 16 |
| 242 | Disease | 21 | 11.8K | 35 | 25 |
| 243 | Medical Anthropology | 141 | 11.5K | 60 | 26 |
| 244 | Depression | 127 | 11.5K | 5 | 6 |
| 245 | Environmental Engineering | 195 | 11.5K | 182 | 181 |
| 246 | Chemical Oceanography | 86 | 11.4K | 5 | 1 |
| 247 | brain mapping | 82 | 11.3K | 32 | 8 |
| 248 | human development | 150 | 11.2K | 13 | 7 |
| 249 | Organic Chemistry | 316 | 11.1K | 82 | 88 |
| 250 | Nanostructures | 84 | 11.1K | 124 | 63 |
| 251 | Vision | 201 | 11.1K | 9 | 12 |
| 252 | Thrombosis | 168 | 11.1K | 16 | 10 |
| 253 | Seismology | 206 | 11.1K | 8 | 6 |
| 253 | Substance Abuse | 351 | 11.1K | 29 | 27 |
| 255 | soil microbiology | 55 | 11.0K | 194 | 56 |
| 256 | Nanostructured Materials | 238 | 10.9K | 183 | 153 |
| 257 | Molecular Genetics | 186 | 10.9K | 62 | 61 |
| 258 | Chemical Engineering | 142 | 10.7K | 671 | 353 |
| 259 | Hormones | 185 | 10.7K | 22 | 15 |
| 260 | Energy Conversion | 101 | 10.7K | 96 | 92 |
| 261 | finance | 59 | 10.7K | 362 | 31 |
| 262 | Pharmacognosy | 186 | 10.6K | 33 | 10 |
| 263 | Zoology | 231 | 10.6K | 77 | 44 |
| 264 | optical instruments | 74 | 10.5K | 24 | 5 |
| 265 | drug addiction | 281 | 10.3K | 25 | 32 |
| 266 | psychotherapy | 115 | 10.3K | 86 | 43 |
| 267 | Control Theory | 237 | 10.3K | 46 | 30 |
| 268 | Biodiversity | 147 | 10.2K | 74 | 55 |
| 269 | Genetic therapy | 136 | 10.2K | 35 | 20 |
| 270 | Proteome | 160 | 10.0K | 19 | 20 |
| 271 | Psychosomatic Medicine | 170 | 10.0K | 11 | 12 |
| 272 | language | 144 | 9.9K | 19 | 5 |
| 273 | Comparative Physiology | 190 | 9.9K | 4 | 4 |
| 274 | Transplantation | 145 | 9.9K | 83 | 65 |
| 275 | Stem cells | 214 | 9.8K | 32 | 35 |
| 276 | Optical materials | 180 | 9.8K | 172 | 144 |
| 277 | Statistical Mechanics | 190 | 9.7K | 19 | 10 |
| 278 | Pharmacogenetics | 126 | 9.6K | 19 | 7 |
| 279 | vascular diseases | 112 | 9.6K | 18 | 9 |
| 280 | Social Psychology | 197 | 9.6K | 116 | 135 |
| 281 | Social Sciences | 266 | 9.5K | 98 | 64 |
| 282 | glycoproteins | 68 | 9.5K | 14 | 1 |
| 282 | Glycoconjugates | 68 | 9.5K | 14 | 1 |
| 282 | glycolipids | 68 | 9.5K | 14 | 1 |
| 285 | Magnetohydrodynamics | 171 | 9.4K | 18 | 8 |
| 286 | Earthquake Engineering | 265 | 9.4K | 35 | 34 |
| 287 | Clinical Psychology | 117 | 9.4K | 81 | 57 |
| 288 | Electrochemistry | 507 | 9.3K | 123 | 200 |
| 289 | Speech | 150 | 9.2K | 42 | 21 |
| 290 | Speech Disorders | 159 | 9.2K | 52 | 28 |
| 291 | health behavior | 307 | 9.1K | 14 | 22 |
| 292 | Education | 262 | 9.1K | 178 | 125 |
| 293 | Carbohydrates | 63 | 9.1K | 8 | 1 |
| 294 | Oligosaccharide | 62 | 9.1K | 3 | 1 |
| 295 | Neuropsychiatry | 196 | 9.0K | 9 | 11 |
| 296 | Photonics | 246 | 9.0K | 88 | 119 |
| 297 | Biogeochemistry | 104 | 9.0K | 60 | 40 |
| 298 | Computer-Aided Design | 150 | 8.9K | 11 | 2 |
| 299 | Developmental Disabilities | 114 | 8.9K | 63 | 35 |
| 300 | Technology | 205 | 8.8K | 230 | 137 |
| 301 | Plant physiology | 76 | 8.8K | 272 | 120 |
| 302 | Economic Development | 99 | 8.6K | 86 | 42 |
| 303 | Polymers | 207 | 8.6K | 492 | 356 |
| 304 | Microcirculation | 165 | 8.6K | 1 | 2 |
| 305 | Environmental Chemistry | 75 | 8.6K | 175 | 127 |
| 306 | Spine | 121 | 8.5K | 20 | 16 |
| 307 | Orthopedics | 195 | 8.3K | 52 | 41 |
| 308 | Wireless Communication Systems | 199 | 8.3K | 132 | 112 |
| 309 | Health Services Research | 133 | 8.2K | 91 | 46 |
| 310 | Adolescent | 327 | 8.2K | 46 | 59 |
| 311 | Molecular Microbiology | 105 | 8.1K | 35 | 43 |
| 312 | Microscopy | 124 | 8.0K | 26 | 16 |
| 313 | Infertility | 108 | 7.9K | 61 | 39 |
| 313 | fertility | 108 | 7.9K | 69 | 41 |
| 315 | Membranes | 165 | 7.9K | 84 | 97 |
| 316 | Molecular Pharmacology | 106 | 7.9K | 15 | 6 |
| 317 | Intelligent Transportation Systems | 67 | 7.9K | 87 | 17 |
| 318 | Physical Chemistry | 219 | 7.8K | 68 | 114 |
| 319 | sanitation | 122 | 7.8K | 115 | 156 |
| 320 | Drug delivery systems | 69 | 7.8K | 103 | 36 |
| 321 | Neuroimmunology | 125 | 7.8K | 12 | 7 |
| 322 | rehabilitation | 186 | 7.7K | 103 | 82 |
| 323 | Emergency Medicine | 250 | 7.6K | 43 | 30 |
| 324 | Bioenergetics | 126 | 7.5K | 14 | 9 |
| 325 | Energy metabolism | 125 | 7.5K | 12 | 7 |
| 326 | Colloids | 183 | 7.5K | 350 | 308 |
| 327 | Chromosome mapping | 162 | 7.5K | 55 | 76 |
| 328 | Geomagnetism | 206 | 7.4K | 9 | 6 |
| 329 | Eating Disorders | 220 | 7.4K | 15 | 18 |
| 330 | cell membrane | 120 | 7.3K | 7 | 8 |
| 331 | Neurolinguistics | 102 | 7.3K | 5 | 6 |
| 332 | nuclear magnetic resonance | 195 | 7.3K | 26 | 24 |
| 333 | Chemotherapy | 191 | 7.2K | 19 | 20 |
| 334 | United Kingdom | 115 | 7.2K | 94 | 75 |
| 335 | Light | 109 | 7.2K | 22 | 58 |
| 336 | Biosensors | 86 | 7.2K | 67 | 23 |
| 337 | Smoking | 190 | 7.2K | 21 | 21 |
| 338 | Surface Chemistry | 135 | 7.2K | 458 | 299 |
| 339 | Solar Energy | 87 | 7.1K | 75 | 22 |
| 340 | Blood vessels | 122 | 7.1K | 1 | 2 |
| 341 | Reproduction | 147 | 7.1K | 162 | 102 |
| 342 | Health Education | 174 | 7.0K | 95 | 56 |
| 343 | Mental Health Services | 154 | 6.9K | 45 | 18 |
| 344 | Philosophy | 216 | 6.8K | 58 | 15 |
| 345 | Feeding and Eating Disorders | 187 | 6.8K | 15 | 19 |
| 346 | Magnetic Resonance Spectroscopy | 185 | 6.8K | 30 | 22 |
| 347 | infection | 96 | 6.7K | 108 | 49 |
| 348 | Leukemia | 72 | 6.7K | 119 | 89 |
| 349 | Neurovirology | 146 | 6.7K | 2 | 2 |
| 350 | Anthropology | 239 | 6.7K | 56 | 44 |
| 351 | Solid State Chemistry | 203 | 6.6K | 93 | 55 |
| 352 | Psychoneuroimmunology | 94 | 6.6K | 15 | 12 |
| 353 | Social behavior | 70 | 6.6K | 103 | 45 |
| 354 | enzymes | 198 | 6.6K | 18 | 30 |
| 355 | Economic History | 161 | 6.5K | 189 | 86 |
| 356 | gene therapy | 101 | 6.5K | 48 | 38 |
| 357 | Biodiversity conservation | 82 | 6.5K | 160 | 195 |
| 358 | Structural dynamics | 160 | 6.5K | 30 | 35 |
| 359 | Nanoparticles | 97 | 6.5K | 135 | 80 |
| 360 | energy development | 17 | 6.5K | 191 | 33 |
| 361 | Algae | 148 | 6.4K | 10 | 9 |
| 362 | Medical Technology | 152 | 6.4K | 14 | 12 |
| 363 | Catalysis | 136 | 6.2K | 543 | 510 |
| 364 | Animal ecology | 76 | 6.2K | 105 | 45 |
| 365 | fuel cells | 80 | 6.2K | 108 | 104 |
| 366 | Quantum electronics | 204 | 6.2K | 54 | 47 |
| 367 | Mathematical Economics | 39 | 6.1K | 23 | 19 |
| 368 | Fluid Dynamics | 119 | 6.1K | 42 | 16 |
| 369 | Public Policy | 176 | 6.1K | 44 | 39 |
| 370 | Solar System | 164 | 5.9K | 46 | 56 |
| 371 | Research Design | 161 | 5.9K | 33 | 66 |
| 372 | Environmental Policy | 90 | 5.8K | 327 | 260 |
| 373 | Developing countries | 113 | 5.8K | 133 | 72 |
| 374 | Composite Materials | 160 | 5.8K | 205 | 240 |
| 375 | environmental protection | 82 | 5.8K | 369 | 191 |
| 376 | Experimental Psychology | 94 | 5.8K | 12 | 14 |
| 377 | Mineralogy | 82 | 5.7K | 163 | 78 |
| 378 | economic policy | 101 | 5.7K | 160 | 45 |
| 379 | Infections | 51 | 5.7K | 130 | 49 |
| 380 | Signal Transduction | 99 | 5.6K | 60 | 62 |
| 381 | Post-traumatic stress disorder | 85 | 5.5K | 39 | 25 |
| 382 | lasers | 183 | 5.4K | 113 | 75 |
| 383 | free radicals | 64 | 5.3K | 125 | 84 |
| 384 | Sports Medicine | 174 | 5.3K | 128 | 152 |
| 385 | Bone diseases | 36 | 5.3K | 27 | 12 |
| 386 | Informatics | 81 | 5.3K | 11 | 13 |
| 387 | Gerontology | 374 | 5.3K | 42 | 77 |
| 388 | Combinatorial chemistry | 56 | 5.2K | 53 | 33 |
| 389 | Recombinant DNA | 91 | 5.2K | 63 | 31 |
| 390 | Computer Vision | 71 | 5.1K | 99 | 104 |
| 391 | Adolescent Medicine | 93 | 5.1K | 37 | 49 |
| 392 | Proteomics | 98 | 5.1K | 23 | 35 |
| 393 | Sound | 102 | 5.0K | 41 | 29 |
| 394 | Clinical Immunology | 147 | 5.0K | 35 | 28 |
| 395 | Immunopathology | 117 | 5.0K | 59 | 54 |
| 396 | Seaweed | 103 | 5.0K | 7 | 8 |
| 397 | Industrial Microbiology | 53 | 4.9K | 213 | 86 |
| 398 | Environmental monitoring | 100 | 4.9K | 393 | 335 |
| 399 | fusion reactors | 219 | 4.9K | 26 | 17 |
| 400 | Numerical Analysis | 102 | 4.9K | 153 | 42 |
| 401 | Lipid metabolism | 29 | 4.9K | 26 | 3 |
| 401 | Lipid | 29 | 4.9K | 27 | 3 |
| 403 | behavior therapy | 108 | 4.8K | 49 | 41 |
| 404 | Archaeology | 93 | 4.8K | 124 | 58 |
| 405 | Fisheries | 127 | 4.7K | 98 | 84 |
| 406 | Sports | 101 | 4.7K | 202 | 117 |
| 407 | drug abuse | 150 | 4.7K | 12 | 9 |
| 408 | Molecular ecology | 71 | 4.7K | 107 | 117 |
| 409 | Radiography | 102 | 4.6K | 55 | 84 |
| 410 | Muscles | 76 | 4.6K | 53 | 34 |
| 411 | Kidney diseases | 108 | 4.6K | 51 | 43 |
| 412 | Population Genetics | 73 | 4.6K | 115 | 120 |
| 412 | peace | 53 | 4.6K | 30 | 13 |
| 414 | Health insurance | 34 | 4.5K | 77 | 31 |
| 415 | Hydrometeorology | 58 | 4.5K | 9 | 11 |
| 416 | Molecular cloning | 74 | 4.5K | 75 | 37 |
| 416 | Genetic recombination | 74 | 4.5K | 65 | 37 |
| 418 | drugs | 140 | 4.4K | 86 | 90 |
| 419 | Clinical Trials | 128 | 4.4K | 12 | 16 |
| 420 | Water pollution | 79 | 4.4K | 376 | 301 |
| 421 | Drug design | 104 | 4.3K | 37 | 40 |
| 422 | Crystallography | 83 | 4.3K | 154 | 60 |
| 423 | Photochemistry | 69 | 4.3K | 95 | 29 |
| 424 | Organometallic compounds | 134 | 4.3K | 17 | 30 |
| 425 | Diagnostic microbiology | 66 | 4.3K | 126 | 164 |
| 425 | personality | 90 | 4.3K | 147 | 172 |
| 427 | Hippocampus | 48 | 4.2K | 14 | 18 |
| 428 | Robotics | 105 | 4.2K | 107 | 82 |
| 429 | Engineering Mathematics | 121 | 4.2K | 72 | 43 |
| 430 | Women's health | 144 | 4.2K | 30 | 30 |
| 431 | Climate change | 53 | 4.2K | 134 | 238 |
| 432 | Natural resources | 34 | 4.2K | 108 | 17 |
| 433 | X-ray crystallography | 55 | 4.1K | 49 | 28 |
| 434 | Forecasting | 38 | 4.1K | 22 | 6 |
| 435 | Eutrophication | 52 | 4.1K | 130 | 244 |
| 436 | Molecules | 53 | 4.1K | 239 | 71 |
| 437 | Petrology | 56 | 4.1K | 169 | 91 |
| 438 | actuators | 110 | 4.0K | 140 | 149 |
| 438 | transducers | 110 | 4.0K | 140 | 149 |
| 440 | International security | 31 | 4.0K | 18 | 10 |
| 440 | Radio waves | 87 | 4.0K | 97 | 76 |
| 442 | Biomolecules | 31 | 4.0K | 24 | 13 |
| 443 | Oxidation-reduction | 60 | 4.0K | 35 | 53 |
| 444 | Combinatorial analysis | 197 | 4.0K | 12 | 14 |
| 445 | environmental pollution | 96 | 4.0K | 624 | 620 |
| 446 | Chronobiology | 37 | 3.9K | 27 | 7 |
| 446 | biological clocks | 37 | 3.9K | 27 | 7 |
| 446 | circadian rhythm | 37 | 3.9K | 27 | 7 |
| 446 | biological rhythms | 36 | 3.9K | 27 | 7 |
| 450 | Thorax | 114 | 3.9K | 22 | 20 |
| 451 | Fiber Optics | 110 | 3.9K | 55 | 47 |
| 452 | Radiology | 168 | 3.9K | 48 | 44 |
| 453 | Steroids | 87 | 3.9K | 46 | 25 |
| 454 | Nephrology | 83 | 3.9K | 55 | 42 |
| 455 | medical education | 168 | 3.8K | 112 | 135 |
| 456 | Circadian rhythms | 33 | 3.8K | 22 | 6 |
| 457 | Nuclear Engineering | 152 | 3.8K | 141 | 95 |
| 458 | Energy Storage | 68 | 3.8K | 110 | 78 |
| 459 | Structure-activity relationship | 25 | 3.8K | 12 | 11 |
| 460 | Ocean Engineering | 120 | 3.8K | 137 | 119 |
| 461 | polymerization | 101 | 3.7K | 691 | 550 |
| 462 | Neuromuscular diseases | 63 | 3.7K | 51 | 38 |
| 463 | Communication | 98 | 3.7K | 161 | 170 |
| 464 | Political Participation | 37 | 3.7K | 16 | 2 |
| 465 | Electrical Engineering | 310 | 3.6K | 129 | 182 |
| 466 | Electrochemical Analysis | 35 | 3.6K | 312 | 67 |
| 467 | Geriatric Psychiatry | 122 | 3.6K | 23 | 30 |
| 468 | Marine mammals | 86 | 3.6K | 7 | 4 |
| 469 | Sun | 95 | 3.6K | 35 | 39 |
| 470 | Biogeochemical cycles | 66 | 3.6K | 19 | 46 |
| 471 | Decision making | 68 | 3.6K | 104 | 89 |
| 472 | Elections | 38 | 3.6K | 26 | 3 |
| 473 | election law | 32 | 3.6K | 15 | 3 |
| 474 | Marine Pollution | 51 | 3.6K | 117 | 58 |
| 475 | Voting | 30 | 3.5K | 19 | 3 |
| 476 | Hydrology | 85 | 3.5K | 282 | 252 |
| 477 | Ethnology | 104 | 3.5K | 63 | 29 |
| 478 | Vocational guidance | 13 | 3.4K | 345 | 78 |
| 479 | Community Psychology | 18 | 3.4K | 152 | 51 |
| 480 | energy conservation | 67 | 3.4K | 230 | 276 |
| 481 | Physical fitness | 75 | 3.4K | 34 | 51 |
| 482 | cloning | 49 | 3.4K | 36 | 48 |
| 483 | Microeconomics | 47 | 3.3K | 17 | 17 |
| 484 | Personality Assessment | 68 | 3.3K | 24 | 33 |
| 485 | Chromosomes | 57 | 3.3K | 74 | 50 |
| 486 | Heart Failure | 81 | 3.3K | 34 | 39 |
| 487 | Bioelectronics | 49 | 3.3K | 115 | 105 |
| 488 | plankton | 63 | 3.3K | 1 | 1 |
| 489 | Cardiovascular diseases | 107 | 3.2K | 112 | 115 |
| 490 | Mobile Computing | 58 | 3.2K | 105 | 47 |
| 491 | Pharmacy | 81 | 3.2K | 219 | 172 |
| 492 | international cooperation | 37 | 3.1K | 59 | 14 |
| 493 | Antioxidants | 46 | 3.1K | 38 | 53 |
| 494 | Hemodynamics | 65 | 3.1K | 53 | 82 |
| 495 | cytokines | 34 | 3.1K | 192 | 50 |
| 496 | Digestive system diseases | 111 | 3.1K | 35 | 36 |
| 497 | Growth factors | 27 | 3.1K | 12 | 9 |
| 498 | Aquatic ecology | 35 | 3.1K | 110 | 9 |
| 499 | atmospheric models | 69 | 3.1K | 62 | 88 |
| 500 | Energy Harvesting | 41 | 3.1K | 53 | 63 |
| 501 | warfare | 36 | 3.0K | 27 | 12 |
| 502 | Machine Learning | 28 | 3.0K | 29 | 42 |
| 503 | Environmental Toxicology | 57 | 3.0K | 310 | 258 |
| 504 | Pediatric Dermatology | 155 | 3.0K | 4 | 4 |
| 505 | Database Management | 80 | 3.0K | 58 | 64 |
| 506 | Cybernetics | 77 | 3.0K | 138 | 198 |
| 507 | drug control | 96 | 3.0K | 12 | 11 |
| 508 | Performance | 39 | 3.0K | 14 | 7 |
| 509 | Endocrine glands | 26 | 3.0K | 22 | 14 |
| 510 | Chronic diseases | 38 | 2.9K | 124 | 125 |
| 511 | Geodynamics | 48 | 2.9K | 124 | 89 |
| 512 | Cytokine | 23 | 2.9K | 37 | 12 |
| 513 | War and Society | 31 | 2.9K | 22 | 11 |
| 514 | histological techniques | 43 | 2.9K | 55 | 41 |
| 515 | Welfare Economics | 45 | 2.9K | 23 | 17 |
| 516 | Semiconductors | 121 | 2.9K | 129 | 95 |
| 517 | Diagnostic Imaging | 129 | 2.9K | 106 | 192 |
| 518 | Quality of life | 61 | 2.9K | 117 | 114 |
| 519 | Marine Ecology | 79 | 2.8K | 23 | 11 |
| 520 | Autism | 67 | 2.8K | 66 | 69 |
| 521 | RNA | 57 | 2.8K | 24 | 31 |
| 522 | child abuse | 56 | 2.8K | 87 | 80 |
| 523 | Teaching | 117 | 2.8K | 87 | 131 |
| 524 | Multimedia Systems | 96 | 2.8K | 96 | 68 |
| 525 | International Relations | 57 | 2.8K | 135 | 45 |
| 526 | auditory perception | 46 | 2.8K | 28 | 27 |
| 527 | Vaccines | 101 | 2.8K | 153 | 203 |
| 528 | biopolymers | 66 | 2.7K | 129 | 100 |
| 528 | mathematical analysis | 180 | 2.7K | 105 | 118 |
| 530 | Clinical Biochemistry | 77 | 2.7K | 73 | 77 |
| 531 | Aerosols | 48 | 2.7K | 70 | 43 |
| 532 | carcinogens | 54 | 2.7K | 80 | 82 |
| 533 | children | 27 | 2.7K | 59 | 22 |
| 534 | Chemical analysis | 39 | 2.7K | 106 | 33 |
| 535 | Political Sociology | 66 | 2.7K | 12 | 21 |
| 536 | Phylogeny | 45 | 2.7K | 80 | 73 |
| 537 | world | 28 | 2.7K | 123 | 67 |
| 538 | Primates | 50 | 2.7K | 77 | 44 |
| 539 | Physical organic chemistry | 67 | 2.6K | 91 | 50 |
| 540 | cryosphere | 52 | 2.6K | 40 | 37 |
| 541 | Development | 31 | 2.6K | 122 | 58 |
| 542 | Soft Condensed Matter | 63 | 2.6K | 130 | 96 |
| 543 | Biogeography | 36 | 2.6K | 151 | 148 |
| 544 | Cheminformatics | 10 | 2.6K | 80 | 12 |
| 545 | Biometrics | 67 | 2.6K | 117 | 111 |
| 546 | Earthquakes | 93 | 2.5K | 9 | 9 |
| 547 | Economic Assistance | 29 | 2.5K | 110 | 54 |
| 548 | Environmental Law | 37 | 2.5K | 174 | 160 |
| 549 | Ethics | 73 | 2.5K | 38 | 9 |
| 550 | Genes | 89 | 2.5K | 44 | 59 |
| 551 | atmosphere | 28 | 2.5K | 118 | 29 |
| 552 | visualization | 194 | 2.5K | 32 | 52 |
| 553 | Developmental Neurobiology | 55 | 2.5K | 10 | 7 |
| 554 | peptides | 91 | 2.5K | 6 | 7 |
| 555 | Dietetics | 65 | 2.5K | 54 | 42 |
| 556 | Organelle biogenesis | 43 | 2.4K | 2 | 2 |
| 557 | Community Psychiatry | 87 | 2.4K | 58 | 97 |
| 558 | water supply | 61 | 2.4K | 118 | 147 |
| 559 | Origin of life | 40 | 2.4K | 3 | 2 |
| 560 | Acoustics | 51 | 2.4K | 20 | 26 |
| 561 | Bipolar Disorder | 64 | 2.4K | 25 | 41 |
| 562 | Conservation Biology | 39 | 2.4K | 160 | 144 |
| 563 | Adolescent Psychology | 76 | 2.4K | 48 | 78 |
| 564 | Exercise | 33 | 2.4K | 268 | 63 |
| 565 | Nuclear non-proliferation | 13 | 2.4K | 15 | 8 |
| 566 | Paleoclimatology | 44 | 2.4K | 186 | 130 |
| 566 | mental processes | 69 | 2.4K | 7 | 3 |
| 568 | polar regions | 54 | 2.4K | 47 | 21 |
| 569 | Software Engineering | 48 | 2.4K | 121 | 100 |
| 570 | behavior modification | 21 | 2.4K | 117 | 55 |
| 571 | Agriculture | 53 | 2.4K | 309 | 239 |
| 572 | cardiac catheterization | 119 | 2.3K | 30 | 33 |
| 573 | health services | 68 | 2.3K | 99 | 81 |
| 574 | commerce | 33 | 2.3K | 244 | 187 |
| 575 | Asthma | 57 | 2.3K | 30 | 19 |
| 576 | Computer Architecture | 69 | 2.3K | 20 | 18 |
| 577 | complementary therapies | 75 | 2.3K | 76 | 64 |
| 578 | Otolaryngology | 89 | 2.3K | 42 | 45 |
| 579 | recreation | 17 | 2.3K | 193 | 14 |
| 580 | Lung Transplantation | 63 | 2.3K | 50 | 66 |
| 580 | Heart transplantation | 63 | 2.3K | 50 | 66 |
| 582 | Energy Policy | 99 | 2.3K | 217 | 490 |
| 583 | Alternative Medicine | 68 | 2.2K | 87 | 63 |
| 584 | Audiology | 52 | 2.2K | 121 | 89 |
| 585 | sexual behavior | 32 | 2.2K | 88 | 46 |
| 586 | Speech Perception | 33 | 2.2K | 38 | 35 |
| 587 | Inflammation | 51 | 2.2K | 69 | 86 |
| 588 | Labor Economics | 17 | 2.2K | 113 | 27 |
| 589 | General Surgery | 47 | 2.2K | 115 | 38 |
| 590 | probabilities | 139 | 2.2K | 42 | 48 |
| 591 | Health Services Administration | 40 | 2.2K | 135 | 80 |
| 592 | Neuroimaging | 71 | 2.2K | 8 | 8 |
| 593 | Sexual health | 106 | 2.2K | 23 | 55 |
| 594 | Food | 72 | 2.2K | 408 | 475 |
| 595 | Soil dynamics | 61 | 2.2K | 22 | 20 |
| 596 | Metastasis | 24 | 2.2K | 9 | 14 |
| 597 | Human-Computer Interaction | 49 | 2.2K | 137 | 92 |
| 598 | Coral reef biology | 51 | 2.2K | 16 | 16 |
| 599 | Orthopedic Surgery | 42 | 2.2K | 94 | 37 |
| 600 | Plant Genetics | 28 | 2.2K | 132 | 103 |
| 601 | Family | 51 | 2.1K | 135 | 95 |
| 602 | ecosystem | 53 | 2.1K | 141 | 210 |
| 603 | labor | 12 | 2.1K | 73 | 18 |
| 604 | working class | 10 | 2.1K | 52 | 18 |
| 605 | economic forecasting | 23 | 2.1K | 32 | 16 |
| 606 | Plant Ecology | 34 | 2.1K | 405 | 325 |
| 606 | Neuropharmacology | 55 | 2.1K | 21 | 26 |
| 608 | health services accessibility | 63 | 2.1K | 66 | 54 |
| 609 | Synthetic biology | 46 | 2.1K | 24 | 15 |
| 610 | Contraception | 81 | 2.1K | 38 | 43 |
| 611 | Geography | 32 | 2.1K | 520 | 301 |
| 612 | Information Science | 53 | 2.0K | 343 | 329 |
| 613 | Culture techniques | 52 | 2.0K | 14 | 9 |
| 614 | gastrointestinal tract | 27 | 2.0K | 20 | 14 |
| 615 | older people | 257 | 2.0K | 59 | 125 |
| 616 | Morphology | 61 | 2.0K | 32 | 33 |
| 617 | Teratology | 47 | 2.0K | 22 | 24 |
| 618 | Ceramics | 49 | 2.0K | 237 | 168 |
| 618 | Neurosurgery | 56 | 2.0K | 84 | 128 |
| 620 | Planetary Science | 77 | 2.0K | 33 | 33 |
| 621 | Biomass Energy | 21 | 2.0K | 863 | 503 |
| 622 | Operations Research | 39 | 2.0K | 500 | 312 |
| 623 | Quantum Optics | 43 | 2.0K | 96 | 45 |
| 624 | North America | 41 | 1.9K | 98 | 37 |
| 625 | Mass Spectrometry | 61 | 1.9K | 110 | 137 |
| 626 | Ecosystem management | 10 | 1.9K | 307 | 58 |
| 627 | Smart Materials | 55 | 1.9K | 72 | 66 |
| 628 | Algebra | 121 | 1.9K | 62 | 30 |
| 629 | scientific societies | 56 | 1.9K | 61 | 63 |
| 630 | international trade | 23 | 1.9K | 97 | 54 |
| 631 | Cryptography | 26 | 1.9K | 78 | 11 |
| 632 | Language Disorders | 53 | 1.9K | 124 | 88 |
| 633 | Oxidative stress | 42 | 1.9K | 45 | 107 |
| 634 | Behavioral Genetics | 50 | 1.9K | 17 | 18 |
| 635 | Glass | 40 | 1.9K | 210 | 166 |
| 635 | pottery | 40 | 1.9K | 205 | 163 |
| 637 | Emotions | 40 | 1.9K | 71 | 96 |
| 638 | Development Economics | 27 | 1.9K | 32 | 21 |
| 639 | Parasitology | 65 | 1.9K | 310 | 274 |
| 640 | Urban Economics | 19 | 1.8K | 69 | 43 |
| 641 | Genetic disorders | 50 | 1.8K | 46 | 48 |
| 642 | Physical Therapy | 51 | 1.8K | 196 | 216 |
| 643 | economic conditions | 34 | 1.8K | 59 | 48 |
| 644 | Functional Genomics | 37 | 1.8K | 14 | 16 |
| 645 | cell interaction | 47 | 1.8K | 70 | 88 |
| 646 | Structural optimization | 34 | 1.8K | 27 | 23 |
| 647 | Functional Analysis | 69 | 1.8K | 100 | 71 |
| 648 | Culture | 66 | 1.8K | 87 | 43 |
| 649 | Microwave devices | 57 | 1.8K | 43 | 36 |
| 650 | Atomic spectroscopy | 45 | 1.8K | 137 | 75 |
| 651 | urban population | 17 | 1.8K | 47 | 25 |
| 652 | Astrocytes | 29 | 1.8K | 46 | 68 |
| 653 | violence | 61 | 1.8K | 89 | 111 |
| 654 | Menopause | 75 | 1.8K | 5 | 10 |
| 655 | Psychiatric hospitals | 64 | 1.8K | 23 | 25 |
| 656 | Computer Science | 58 | 1.8K | 188 | 100 |
| 657 | Humanities | 35 | 1.7K | 198 | 24 |
| 658 | Plant genetic engineering | 33 | 1.7K | 163 | 166 |
| 659 | Cognitive Therapy | 55 | 1.7K | 29 | 34 |
| 660 | Microprocessors | 43 | 1.7K | 33 | 16 |
| 660 | feeding behavior | 58 | 1.7K | 46 | 87 |
| 662 | Nondestructive testing | 56 | 1.7K | 41 | 29 |
| 663 | Economic Thought | 30 | 1.7K | 28 | 48 |
| 664 | Electrophysiology | 82 | 1.7K | 68 | 89 |
| 664 | Estuaries | 26 | 1.7K | 23 | 21 |
| 664 | Laser Spectroscopy | 36 | 1.7K | 107 | 52 |
| 667 | urban health | 44 | 1.7K | 22 | 22 |
| 667 | Cosmochemistry | 66 | 1.7K | 56 | 118 |
| 669 | Paleoceanography | 21 | 1.7K | 39 | 40 |
| 670 | drug evaluation | 58 | 1.7K | 76 | 68 |
| 671 | Speech acoustics | 21 | 1.7K | 32 | 36 |
| 672 | Thermodynamics | 14 | 1.7K | 462 | 39 |
| 672 | educational innovations | 25 | 1.7K | 61 | 22 |
| 674 | Radiation | 106 | 1.7K | 146 | 236 |
| 675 | management | 35 | 1.7K | 905 | 810 |
| 676 | Structural Engineering | 70 | 1.6K | 225 | 254 |
| 677 | Thermochemistry | 10 | 1.6K | 225 | 26 |
| 677 | Primary health care | 91 | 1.6K | 149 | 209 |
| 677 | Asia | 47 | 1.6K | 415 | 180 |
| 680 | Computational Fluid Dynamics | 31 | 1.6K | 79 | 16 |
| 681 | Continental shelf | 41 | 1.6K | 46 | 53 |
| 682 | Hearing | 43 | 1.6K | 129 | 83 |
| 683 | Hemostasis | 64 | 1.6K | 44 | 53 |
| 683 | Interactive multimedia | 42 | 1.6K | 72 | 67 |
| 685 | families | 30 | 1.6K | 172 | 73 |
| 686 | multimedia | 41 | 1.6K | 71 | 66 |
| 687 | conflict management | 18 | 1.6K | 46 | 15 |
| 688 | Genetic translocation | 26 | 1.6K | 7 | 7 |
| 688 | plasmids | 26 | 1.6K | 7 | 7 |
| 690 | Dynamics | 59 | 1.6K | 112 | 71 |
| 691 | blood transfusion | 88 | 1.6K | 62 | 80 |
| 692 | geological modeling | 45 | 1.6K | 27 | 48 |
| 693 | Geochemical Modeling | 44 | 1.6K | 24 | 47 |
| 694 | Geometry | 113 | 1.6K | 27 | 29 |
| 695 | Human evolution | 21 | 1.6K | 106 | 82 |
| 696 | Social work | 64 | 1.6K | 188 | 132 |
| 697 | Europe | 59 | 1.6K | 550 | 461 |
| 698 | Clinical Pharmacology | 49 | 1.6K | 196 | 177 |
| 698 | structural stability | 48 | 1.6K | 9 | 25 |
| 700 | vibration | 48 | 1.6K | 139 | 142 |
| 701 | marketing | 37 | 1.6K | 409 | 427 |
| 702 | Ceramic materials | 19 | 1.5K | 430 | 142 |
| 703 | Paleoecology | 40 | 1.5K | 183 | 174 |
| 704 | Wildlife conservation | 22 | 1.5K | 322 | 242 |
| 705 | China | 93 | 1.5K | 312 | 360 |
| 706 | Bones | 30 | 1.5K | 150 | 172 |
| 707 | calcification | 32 | 1.5K | 68 | 67 |
| 708 | Paleogeography | 35 | 1.5K | 172 | 160 |
| 709 | Hydraulic Engineering | 32 | 1.5K | 199 | 120 |
| 710 | Plastics | 25 | 1.5K | 455 | 192 |
| 711 | Birds | 42 | 1.5K | 227 | 134 |
| 712 | Medicinal Chemistry | 1 | 1.5K | 3 | 1 |
| 713 | ethanol | 51 | 1.4K | 34 | 36 |
| 714 | Business | 22 | 1.4K | 677 | 556 |
| 715 | Marine Geophysics | 43 | 1.4K | 13 | 4 |
| 716 | Bioinorganic chemistry | 60 | 1.4K | 127 | 153 |
| 717 | Behavioral research | 17 | 1.4K | 69 | 8 |
| 718 | Sustainable Development | 35 | 1.4K | 284 | 343 |
| 719 | child behavior | 119 | 1.4K | 2 | 50 |
| 720 | plasticity | 18 | 1.4K | 98 | 77 |
| 721 | mass transfer | 48 | 1.4K | 289 | 347 |
| 722 | Structural health monitoring | 46 | 1.4K | 5 | 12 |
| 723 | Biological Systems | 24 | 1.4K | 56 | 21 |
| 724 | Green Chemistry | 18 | 1.4K | 692 | 525 |
| 725 | Information Technology | 32 | 1.3K | 486 | 413 |
| 726 | Child welfare | 48 | 1.3K | 141 | 121 |
| 727 | liver | 52 | 1.3K | 10 | 5 |
| 728 | Tribology | 93 | 1.3K | 73 | 159 |
| 728 | Carcinogenesis | 29 | 1.3K | 198 | 201 |
| 728 | health planning | 57 | 1.3K | 247 | 233 |
| 731 | Immunopharmacology | 42 | 1.3K | 136 | 103 |
| 732 | Entomology | 48 | 1.3K | 458 | 361 |
| 733 | Structural design | 38 | 1.3K | 90 | 88 |
| 734 | Hallucinogens | 34 | 1.3K | 5 | 4 |
| 735 | mutagens | 25 | 1.3K | 185 | 191 |
| 736 | Fishery resources | 33 | 1.3K | 73 | 65 |
| 737 | Altitude Sickness | 45 | 1.3K | 2 | 4 |
| 737 | Altitude | 45 | 1.3K | 2 | 4 |
| 739 | Medical Ethics | 93 | 1.3K | 75 | 90 |
| 740 | sustainability | 28 | 1.3K | 110 | 180 |
| 741 | Parenteral nutrition | 31 | 1.3K | 205 | 253 |
| 742 | Parasitic Diseases | 45 | 1.3K | 301 | 379 |
| 743 | Soil Mechanics | 34 | 1.3K | 271 | 235 |
| 744 | motivation | 44 | 1.3K | 7 | 42 |
| 744 | Soviet Union | 7 | 1.3K | 392 | 11 |
| 746 | Histochemistry | 35 | 1.3K | 132 | 111 |
| 747 | Transport | 32 | 1.3K | 81 | 83 |
| 747 | Sea | 32 | 1.3K | 68 | 58 |
| 749 | Environmental Management | 37 | 1.3K | 704 | 836 |
| 749 | Production Management | 21 | 1.3K | 318 | 340 |
| 751 | adolescence | 45 | 1.3K | 129 | 188 |
| 752 | Psychometrics | 24 | 1.2K | 101 | 107 |
| 753 | Radiotherapy | 63 | 1.2K | 33 | 26 |
| 754 | breastfeeding | 108 | 1.2K | 3 | 18 |
| 755 | Appetite | 38 | 1.2K | 67 | 102 |
| 756 | Parallel Processing | 31 | 1.2K | 75 | 92 |
| 757 | cell movement | 20 | 1.2K | 28 | 23 |
| 758 | Neurotoxicology | 28 | 1.2K | 49 | 56 |
| 759 | Magnetic Materials | 40 | 1.2K | 310 | 300 |
| 760 | organization | 17 | 1.2K | 250 | 247 |
| 761 | Birth control | 37 | 1.2K | 52 | 51 |
| 762 | impact | 23 | 1.2K | 66 | 54 |
| 763 | counseling | 48 | 1.2K | 225 | 239 |
| 764 | Mechanical Engineering | 45 | 1.2K | 538 | 332 |
| 765 | nuclear magnetic resonance spectroscopy | 35 | 1.2K | 93 | 71 |
| 765 | Australia | 50 | 1.2K | 257 | 222 |
| 767 | Databases | 31 | 1.2K | 77 | 75 |
| 768 | Antiviral agents | 36 | 1.2K | 22 | 18 |
| 769 | Nutrition physiology | 22 | 1.2K | 146 | 112 |
| 770 | Immunochemistry | 52 | 1.2K | 66 | 115 |
| 771 | Retina | 12 | 1.2K | 42 | 81 |
| 771 | eye | 12 | 1.2K | 47 | 86 |
| 773 | Geomorphology | 25 | 1.2K | 381 | 337 |
| 774 | Microfabrication | 15 | 1.2K | 85 | 18 |
| 775 | Forensic Psychiatry | 30 | 1.2K | 88 | 43 |
| 776 | Reproductive health | 36 | 1.1K | 96 | 94 |
| 777 | epilepsy | 48 | 1.1K | 105 | 144 |
| 778 | Consciousness | 27 | 1.1K | 47 | 42 |
| 779 | Electromagnetism | 42 | 1.1K | 137 | 160 |
| 780 | Public Choice | 18 | 1.1K | 62 | 29 |
| 780 | Group decision making | 18 | 1.1K | 85 | 42 |
| 782 | Government policy | 16 | 1.1K | 22 | 18 |
| 783 | Chemical Ecology | 19 | 1.1K | 128 | 99 |
| 784 | psychophysics | 27 | 1.1K | 28 | 11 |
| 785 | collagen | 16 | 1.1K | 45 | 59 |
| 786 | Cytoskeleton | 24 | 1.1K | 30 | 29 |
| 787 | Respiratory system | 38 | 1.1K | 61 | 77 |
| 788 | pheromones | 18 | 1.1K | 121 | 93 |
| 789 | Technological Innovations | 38 | 1.1K | 81 | 92 |
| 790 | Biopharmaceutics | 32 | 1.1K | 172 | 209 |
| 791 | Hydrodynamics | 15 | 1.1K | 214 | 106 |
| 792 | Enteral nutrition | 16 | 1.1K | 273 | 220 |
| 793 | Nonlinear systems | 43 | 1.1K | 52 | 62 |
| 794 | Music | 24 | 1.1K | 165 | 64 |
| 795 | Journalism | 13 | 1.1K | 165 | 30 |
| 795 | Hematopoietic stem cell transplantation | 24 | 1.1K | 38 | 42 |
| 795 | Hospitals | 66 | 1.1K | 47 | 55 |
| 798 | Educational Psychology | 20 | 1.1K | 480 | 345 |
| 798 | Mitochondria | 24 | 1.1K | 11 | 10 |
| 800 | harm reduction | 45 | 1.1K | 7 | 8 |
| 801 | Allergies | 11 | 1.1K | 24 | 15 |
| 802 | Multivariate Analysis | 26 | 1.0K | 76 | 63 |
| 803 | Climate | 28 | 1.0K | 50 | 76 |
| 804 | data protection | 14 | 1.0K | 106 | 25 |
| 805 | microwave communication systems | 42 | 1.0K | 36 | 50 |
| 806 | artificial cells | 36 | 1.0K | 3 | 2 |
| 807 | Elderly | 212 | 1.0K | 49 | 95 |
| 808 | Suicide | 44 | 1.0K | 43 | 72 |
| 809 | Power Electronics | 17 | 1.0K | 458 | 342 |
| 810 | Ergonomics | 31 | 1.0K | 248 | 164 |
| 811 | plant communities | 10 | 1.0K | 567 | 368 |
| 812 | Electrophoresis | 28 | 1.0K | 382 | 296 |
| 813 | Brachytherapy | 44 | 1.0K | 15 | 15 |
| 814 | Socialization | 22 | 1.0K | 104 | 101 |
| 815 | International Finance | 17 | 1.0K | 626 | 327 |
| 816 | Cardiac electrophysiology | 32 | 1.0K | 23 | 39 |
| 816 | arrhythmia | 32 | 1.0K | 23 | 39 |
| 818 | Telemedicine | 15 | 1.0K | 71 | 31 |
| 818 | Carbon | 27 | 1.0K | 321 | 454 |
| 820 | Rock deformation | 2 | 1.0K | 255 | 8 |
| 821 | air quality management | 13 | 993 | 131 | 53 |
| 822 | Extracellular matrix | 12 | 992 | 63 | 63 |
| 822 | Educational Change | 18 | 992 | 3 | 2 |
| 824 | Discourse Analysis | 26 | 991 | 28 | 29 |
| 825 | Engineering Geology | 27 | 987 | 370 | 312 |
| 825 | Protein engineering | 13 | 987 | 61 | 36 |
| 827 | Measurement | 35 | 979 | 200 | 150 |
| 828 | Anthropological Linguistics | 23 | 976 | 35 | 5 |
| 828 | Nuclear Energy | 28 | 976 | 305 | 159 |
| 828 | Ventilation | 13 | 976 | 162 | 66 |
| 831 | Randomized Controlled Trials | 47 | 975 | 126 | 105 |
| 832 | indoor air pollution | 11 | 947 | 121 | 55 |
| 832 | Sick building syndrome | 11 | 947 | 121 | 55 |
| 834 | psychopathology | 28 | 946 | 55 | 94 |
| 835 | exobiology | 15 | 941 | 72 | 60 |
| 835 | energy resources | 19 | 941 | 434 | 545 |
| 837 | Apoptosis | 14 | 936 | 43 | 17 |
| 837 | neurotoxins | 14 | 936 | 43 | 17 |
| 837 | Neurotoxic agents | 14 | 936 | 43 | 17 |
| 837 | blood substitutes | 25 | 936 | 7 | 2 |
| 837 | Nerve regeneration | 14 | 936 | 43 | 17 |
| 842 | Game Theory | 26 | 935 | 99 | 72 |
| 843 | Mechanics | 54 | 933 | 112 | 163 |
| 844 | Knowledge | 40 | 929 | 53 | 44 |
| 845 | Intellectual disability | 21 | 918 | 239 | 165 |
| 846 | environmental exposure | 41 | 907 | 279 | 465 |
| 846 | Antigens | 38 | 907 | 130 | 196 |
| 848 | Genetic algorithms | 8 | 906 | 151 | 123 |
| 848 | Evolutionary Computation | 8 | 906 | 190 | 142 |
| 850 | Sedimentology | 18 | 894 | 140 | 117 |
| 850 | air | 20 | 894 | 26 | 41 |
| 852 | DNA repair | 14 | 886 | 77 | 49 |
| 853 | women | 41 | 884 | 59 | 37 |
| 854 | Industrial Policy | 9 | 882 | 206 | 73 |
| 855 | Sarcopenia | 13 | 881 | 89 | 79 |
| 856 | Phonetics | 16 | 880 | 90 | 56 |
| 856 | sex crimes | 42 | 880 | 54 | 85 |
| 858 | race relations | 37 | 877 | 52 | 62 |
| 859 | Systems Analysis | 13 | 875 | 430 | 121 |
| 860 | Global Health | 44 | 870 | 122 | 120 |
| 860 | Autoimmune diseases | 40 | 870 | 53 | 131 |
| 862 | cross-cultural comparison | 26 | 866 | 59 | 35 |
| 862 | immigration | 13 | 866 | 28 | 30 |
| 862 | Sites | 15 | 866 | 182 | 144 |
| 862 | migration policy | 14 | 866 | 33 | 30 |
| 862 | Asylum seeker | 13 | 866 | 27 | 30 |
| 867 | radiative transfer | 70 | 865 | 32 | 93 |
| 867 | Body Image | 28 | 865 | 21 | 38 |
| 869 | Autoimmunity | 26 | 864 | 152 | 225 |
| 870 | Antibodies | 35 | 863 | 81 | 139 |
| 871 | Political Psychology | 22 | 862 | 61 | 81 |
| 872 | elasticity | 32 | 858 | 14 | 18 |
| 873 | Neonatology | 19 | 856 | 134 | 85 |
| 873 | color | 15 | 856 | 50 | 17 |
| 875 | Semantics | 13 | 853 | 32 | 11 |
| 876 | Serology | 10 | 851 | 162 | 47 |
| 877 | city planning | 22 | 847 | 462 | 322 |
| 878 | embryonic development | 13 | 844 | 127 | 61 |
| 879 | Computer Engineering | 68 | 841 | 12 | 50 |
| 880 | Cell survival | 23 | 839 | 7 | 22 |
| 880 | molecular chaperones | 23 | 839 | 8 | 22 |
| 882 | DNS | 21 | 837 | 62 | 57 |
| 883 | Industry | 4 | 830 | 119 | 31 |
| 884 | Tropical Medicine | 34 | 829 | 329 | 317 |
| 885 | foreign exchange | 11 | 827 | 105 | 60 |
| 886 | Detectors | 35 | 822 | 269 | 265 |
| 887 | DNA | 26 | 818 | 47 | 40 |
| 888 | Ornithology | 20 | 812 | 309 | 169 |
| 888 | Japan | 40 | 812 | 313 | 270 |
| 890 | Sustainable Engineering | 17 | 808 | 602 | 525 |
| 891 | Algal blooms | 19 | 802 | 49 | 84 |
| 891 | Cyanobacteria | 19 | 802 | 49 | 84 |
| 891 | microalgae | 19 | 802 | 49 | 84 |
| 894 | Investment analysis | 10 | 801 | 372 | 113 |
| 895 | Industrial Organization | 8 | 799 | 120 | 33 |
| 896 | Environmental pollutants | 25 | 794 | 638 | 693 |
| 897 | Social problems | 17 | 793 | 161 | 151 |
| 898 | antibiotics | 21 | 792 | 23 | 17 |
| 899 | Ultrasonics | 31 | 789 | 227 | 314 |
| 900 | Insects | 31 | 787 | 302 | 324 |
| 901 | Cosmology | 21 | 784 | 128 | 127 |
| 902 | Family Therapy | 32 | 782 | 134 | 125 |
| 903 | Radio wave propagation | 25 | 780 | 162 | 74 |
| 904 | Educational Anthropology | 19 | 779 | 15 | 8 |
| 905 | chronic disease | 21 | 778 | 72 | 63 |
| 906 | Nanomedicine | 13 | 771 | 23 | 19 |
| 906 | Luminescence | 27 | 771 | 258 | 152 |
| 908 | biomedicine | 21 | 770 | 83 | 73 |
| 909 | Bioethics | 62 | 766 | 90 | 112 |
| 910 | Brain damage | 18 | 762 | 100 | 77 |
| 911 | Economic Theory | 15 | 759 | 16 | 10 |
| 912 | Sedimentary rocks | 9 | 758 | 276 | 118 |
| 912 | Population | 25 | 758 | 171 | 198 |
| 914 | Volcanoes | 16 | 751 | 74 | 57 |
| 915 | Peptide | 27 | 750 | 18 | 19 |
| 916 | Graph Theory | 47 | 746 | 74 | 68 |
| 917 | California | 26 | 743 | 85 | 73 |
| 918 | mammals | 35 | 742 | 153 | 194 |
| 919 | Nanophotonics | 16 | 739 | 36 | 36 |
| 920 | Risk | 21 | 736 | 105 | 146 |
| 921 | Heat Exchangers | 11 | 732 | 617 | 360 |
| 922 | Adaptive control systems | 22 | 728 | 102 | 42 |
| 923 | Neurogenetics | 24 | 725 | 21 | 23 |
| 924 | Cognitive Behavioral Therapy | 20 | 721 | 21 | 20 |
| 925 | Artificial Organs | 36 | 720 | 93 | 94 |
| 925 | Developmental Immunology | 9 | 720 | 270 | 119 |
| 927 | Organometallic chemistry | 32 | 716 | 444 | 337 |
| 928 | Synaptic Transmission | 15 | 715 | 145 | 104 |
| 929 | Plant Biotechnology | 12 | 713 | 327 | 212 |
| 930 | Macroeconomics | 13 | 710 | 81 | 35 |
| 931 | Geotechnical Engineering | 19 | 709 | 133 | 108 |
| 931 | Nuclear Medicine | 32 | 709 | 242 | 331 |
| 933 | Forensic Psychology | 22 | 704 | 55 | 32 |
| 933 | Protozoa | 13 | 704 | 131 | 103 |
| 935 | Marine Geology | 11 | 701 | 276 | 154 |
| 936 | Combinatorial optimization | 13 | 700 | 117 | 10 |
| 937 | Fracture mechanics | 34 | 697 | 354 | 408 |
| 938 | Microbial Biotechnology | 15 | 696 | 232 | 158 |
| 939 | Analytical Toxicology | 25 | 695 | 22 | 23 |
| 940 | Jurisprudence | 22 | 692 | 237 | 157 |
| 941 | software | 27 | 691 | 155 | 255 |
| 941 | biological invasions | 21 | 691 | 100 | 109 |
| 941 | Human biology | 24 | 691 | 112 | 97 |
| 944 | Amyotrophic Lateral Sclerosis | 6 | 688 | 154 | 54 |
| 944 | Frontotemporal lobar degeneration | 6 | 688 | 130 | 30 |
| 944 | Pregnancy | 21 | 688 | 203 | 169 |
| 947 | Radiochemistry | 9 | 685 | 574 | 140 |
| 948 | Nuclear Chemistry | 8 | 683 | 673 | 185 |
| 949 | Petroleum Geology | 9 | 682 | 290 | 158 |
| 950 | Parasites | 25 | 680 | 421 | 411 |
| 951 | molecular design | 15 | 679 | 59 | 52 |
| 952 | internet | 27 | 676 | 380 | 459 |
| 953 | Public opinion | 27 | 674 | 40 | 75 |
| 953 | Extreme environments | 10 | 674 | 52 | 27 |
| 955 | prostaglandins | 22 | 673 | 98 | 95 |
| 956 | government | 46 | 672 | 78 | 139 |
| 957 | amino acids | 22 | 666 | 61 | 89 |
| 958 | Money | 4 | 665 | 289 | 42 |
| 959 | tomography | 40 | 663 | 30 | 59 |
| 960 | Agricultural Ecology | 10 | 662 | 516 | 424 |
| 961 | Moon | 35 | 656 | 14 | 9 |
| 962 | Paleontology | 24 | 650 | 418 | 348 |
| 962 | pollutants | 18 | 650 | 677 | 708 |
| 964 | Patient education | 22 | 648 | 168 | 202 |
| 965 | Climate Change Mitigation | 3 | 645 | 28 | 17 |
| 965 | Evidence-Based Medicine | 30 | 645 | 86 | 103 |
| 965 | Global warming | 3 | 645 | 105 | 17 |
| 965 | sea level | 3 | 645 | 28 | 17 |
| 969 | Geodesy | 17 | 644 | 167 | 104 |
| 970 | Fishery management | 10 | 643 | 386 | 164 |
| 971 | Rock Mechanics | 19 | 642 | 304 | 320 |
| 972 | Autoantibodies | 22 | 639 | 119 | 162 |
| 973 | Aggression | 9 | 638 | 207 | 135 |
| 974 | Cultural diversity | 11 | 637 | 59 | 36 |
| 975 | Ethnoarchaeology | 13 | 632 | 33 | 23 |
| 976 | Mechatronics | 11 | 631 | 391 | 228 |
| 977 | Religion | 16 | 630 | 278 | 39 |
| 978 | Maternal health services | 25 | 629 | 62 | 73 |
| 978 | Cell division | 8 | 629 | 164 | 76 |
| 980 | Flow cytometry | 20 | 627 | 59 | 73 |
| 981 | Manufacturing Processes | 20 | 624 | 888 | 789 |
| 982 | Nursing | 29 | 621 | 442 | 344 |
| 983 | Energy Consumption | 9 | 620 | 166 | 149 |
| 984 | research and development | 5 | 618 | 243 | 81 |
| 985 | Queuing Theory | 10 | 617 | 60 | 16 |
| 986 | Probability | 33 | 611 | 62 | 140 |
| 987 | Fisheries Law | 7 | 609 | 74 | 44 |
| 987 | fisheries management | 7 | 609 | 74 | 44 |
| 989 | Law | 27 | 606 | 270 | 149 |
| 990 | Antibacterial agents | 13 | 602 | 225 | 183 |
| 991 | Magnetic Resonance Imaging | 24 | 600 | 107 | 119 |
| 992 | Radioisotopes | 30 | 590 | 243 | 189 |
| 993 | Ethnic relations | 34 | 589 | 48 | 58 |
| 994 | Credit | 3 | 586 | 106 | 18 |
| 995 | Laser therapy | 36 | 585 | 37 | 31 |
| 995 | child mental health | 28 | 585 | 70 | 86 |
| 997 | Nitric oxide | 6 | 584 | 108 | 29 |
| 998 | Cross-Cultural Studies | 16 | 583 | 160 | 103 |
| 999 | Cognitive Psychology | 23 | 582 | 40 | 40 |
| 1000 | Gastrointestinal diseases | 20 | 581 | 105 | 89 |