| 1 | Science | 8,377 | 1.2M | 9 | 9 |
| 2 | Biology | 7,055 | 1.0M | 12 | 9 |
| 3 | Physics | 6,993 | 1.0M | 27 | 13 |
| 4 | Natural history | 2,095 | 611.1K | 9 | 9 |
| 5 | Medicine | 6,434 | 558.3K | 12 | 9 |
| 6 | Cell Biology | 2,544 | 483.9K | 5 | 6 |
| 7 | Cytology | 2,861 | 478.0K | 5 | 6 |
| 8 | Neurology | 4,953 | 438.5K | 8 | 7 |
| 9 | Molecular Biology | 4,244 | 416.2K | 11 | 10 |
| 10 | Biochemistry | 5,831 | 384.1K | 15 | 9 |
| 11 | Chemistry | 3,184 | 318.1K | 77 | 36 |
| 12 | Psychiatry | 3,618 | 306.0K | 4 | 3 |
| 13 | Virology | 1,415 | 304.7K | 11 | 8 |
| 14 | Astrophysics | 2,512 | 276.2K | 47 | 25 |
| 15 | Spectrum analysis | 2,088 | 218.8K | 24 | 14 |
| 16 | Immunology | 1,621 | 187.4K | 10 | 5 |
| 17 | Neurophysiology | 1,686 | 185.2K | 4 | 3 |
| 18 | Immunity | 863 | 168.3K | 4 | 4 |
| 19 | Research | 3,004 | 163.9K | 25 | 13 |
| 20 | Psychophysiology | 1,805 | 155.8K | 3 | 2 |
| 21 | Genetics | 1,595 | 154.2K | 15 | 21 |
| 22 | Microbiology | 1,649 | 143.2K | 47 | 34 |
| 23 | Nuclear Physics | 2,558 | 135.4K | 42 | 26 |
| 24 | Mental Disorders | 1,787 | 133.9K | 4 | 3 |
| 25 | Astronomy | 1,525 | 132.6K | 75 | 55 |
| 26 | Psychopharmacology | 1,189 | 124.4K | 1 | 2 |
| 27 | Physiology | 1,939 | 123.7K | 8 | 4 |
| 28 | Human genetics | 579 | 121.3K | 29 | 38 |
| 29 | Economics | 1,223 | 120.7K | 18 | 11 |
| 30 | Psychology | 1,839 | 117.9K | 15 | 15 |
| 31 | Ecology | 1,284 | 117.3K | 71 | 46 |
| 32 | Surgery | 520 | 100.4K | 18 | 8 |
| 33 | Environmental Health | 976 | 96.3K | 31 | 9 |
| 34 | Pediatrics | 1,567 | 87.7K | 12 | 10 |
| 35 | Behavior | 1,252 | 85.7K | 7 | 4 |
| 36 | Pollution | 692 | 85.3K | 84 | 21 |
| 37 | Neurons | 354 | 85.1K | 10 | 10 |
| 38 | United States | 1,722 | 84.8K | 48 | 23 |
| 39 | Endocrinology | 1,356 | 83.9K | 17 | 22 |
| 40 | Pharmacology | 1,358 | 82.2K | 39 | 12 |
| 41 | Biophysics | 1,748 | 80.0K | 28 | 25 |
| 42 | Social Psychology | 833 | 76.9K | 11 | 7 |
| 43 | Public Health | 1,555 | 76.1K | 32 | 37 |
| 44 | Cancer | 1,117 | 75.6K | 13 | 14 |
| 45 | Bacteriology | 645 | 74.8K | 7 | 6 |
| 46 | Immune system | 252 | 73.2K | 10 | 3 |
| 47 | Environmental Engineering | 543 | 70.9K | 39 | 7 |
| 48 | Allergy | 372 | 69.6K | 8 | 4 |
| 49 | Developmental Biology | 776 | 68.0K | 16 | 20 |
| 50 | Metabolic diseases | 709 | 67.3K | 18 | 16 |
| 51 | Brain | 904 | 63.2K | 10 | 9 |
| 52 | Epidemiology | 942 | 61.7K | 27 | 19 |
| 53 | sanitation | 416 | 61.5K | 12 | 4 |
| 54 | human behavior | 555 | 59.6K | 13 | 5 |
| 55 | Mental illness | 910 | 58.1K | 5 | 5 |
| 56 | Geriatrics | 1,054 | 56.8K | 14 | 7 |
| 57 | Solid State Physics | 779 | 55.5K | 130 | 50 |
| 58 | Geology | 661 | 54.6K | 54 | 20 |
| 59 | Liver diseases | 606 | 54.4K | 3 | 7 |
| 60 | Environment | 612 | 53.6K | 83 | 68 |
| 61 | Condensed Matter | 746 | 53.4K | 123 | 57 |
| 62 | Medical genetics | 655 | 52.7K | 44 | 38 |
| 63 | Metabolism | 782 | 51.8K | 18 | 26 |
| 64 | Neurobiology | 532 | 50.4K | 15 | 9 |
| 65 | Obstetrics | 1,055 | 49.9K | 10 | 5 |
| 66 | Hematology | 1,147 | 49.6K | 26 | 44 |
| 67 | Child psychology | 723 | 47.9K | 5 | 14 |
| 68 | Immunotherapy | 271 | 47.1K | 28 | 5 |
| 69 | Diabetes | 519 | 47.0K | 15 | 11 |
| 70 | Diabetes mellitus | 512 | 46.8K | 11 | 9 |
| 71 | Nervous system | 338 | 46.8K | 51 | 17 |
| 72 | Nanotechnology | 537 | 45.8K | 179 | 122 |
| 73 | Perception | 943 | 44.9K | 5 | 3 |
| 74 | Cardiovascular system | 490 | 44.7K | 25 | 28 |
| 75 | Child Development | 730 | 44.5K | 7 | 14 |
| 76 | Memory | 898 | 43.5K | 6 | 2 |
| 77 | Cognitive neuroscience | 365 | 43.3K | 5 | 7 |
| 78 | Botany | 754 | 43.3K | 63 | 61 |
| 79 | Econometrics | 311 | 42.9K | 4 | 7 |
| 80 | Neurochemistry | 608 | 41.9K | 10 | 5 |
| 81 | Embryology | 420 | 41.1K | 19 | 13 |
| 82 | psychotherapy | 334 | 40.9K | 4 | 3 |
| 83 | personality | 360 | 40.5K | 14 | 10 |
| 84 | finance | 161 | 39.5K | 72 | 3 |
| 85 | Growth | 348 | 39.0K | 18 | 19 |
| 86 | Child | 989 | 38.3K | 5 | 5 |
| 87 | Statistical physics | 680 | 38.1K | 70 | 36 |
| 88 | Biotechnology | 388 | 38.1K | 217 | 118 |
| 89 | Cytogenetics | 340 | 38.0K | 18 | 14 |
| 90 | Oncology | 425 | 37.8K | 20 | 15 |
| 91 | Clinical Psychology | 387 | 37.8K | 3 | 2 |
| 92 | Cognition | 531 | 37.4K | 7 | 7 |
| 93 | Sociology | 584 | 36.7K | 25 | 21 |
| 94 | Obesity | 612 | 36.6K | 8 | 5 |
| 95 | gene mapping | 418 | 36.4K | 8 | 8 |
| 96 | Attention | 812 | 35.8K | 6 | 3 |
| 97 | Substance Abuse | 961 | 35.7K | 2 | 1 |
| 98 | Molecular structure | 315 | 35.3K | 13 | 8 |
| 99 | Membranes | 397 | 34.9K | 11 | 6 |
| 100 | Visual Perception | 794 | 34.9K | 6 | 3 |
| 101 | Geochemistry | 353 | 34.9K | 54 | 24 |
| 102 | Political Science | 566 | 34.5K | 7 | 3 |
| 103 | alcoholism | 762 | 33.6K | 3 | 6 |
| 104 | Automation | 198 | 33.0K | 103 | 22 |
| 105 | biological evolution | 498 | 32.9K | 16 | 39 |
| 106 | Bioengineering | 297 | 32.6K | 154 | 83 |
| 107 | Hypertension | 416 | 32.4K | 28 | 32 |
| 108 | Artificial Intelligence | 219 | 32.1K | 150 | 32 |
| 109 | Geophysics | 564 | 31.8K | 142 | 99 |
| 110 | Cell differentiation | 372 | 31.8K | 27 | 32 |
| 111 | Schizophrenia | 645 | 31.3K | 3 | 8 |
| 112 | Meteorites | 224 | 30.7K | 36 | 14 |
| 113 | nucleic acids | 467 | 30.3K | 8 | 31 |
| 114 | Reproduction | 495 | 30.1K | 17 | 5 |
| 115 | Plant cells | 187 | 30.0K | 44 | 32 |
| 116 | Dermatology | 782 | 29.9K | 9 | 11 |
| 117 | cell physiology | 394 | 29.5K | 10 | 10 |
| 118 | Anatomy | 399 | 28.9K | 26 | 30 |
| 119 | Quantum Gravity | 565 | 28.8K | 88 | 86 |
| 120 | Genetic regulation | 209 | 28.5K | 16 | 15 |
| 121 | Materials | 317 | 28.1K | 527 | 252 |
| 122 | Developmental Genetics | 206 | 27.8K | 10 | 14 |
| 123 | Pharmaceutical Chemistry | 475 | 27.3K | 62 | 41 |
| 124 | Cell metabolism | 125 | 26.9K | 3 | 6 |
| 125 | Homeostasis | 117 | 26.8K | 4 | 6 |
| 126 | Chronic diseases | 228 | 26.2K | 9 | 16 |
| 127 | Neuropsychology | 474 | 26.2K | 11 | 12 |
| 128 | Economic Development | 222 | 26.1K | 16 | 6 |
| 129 | Gene expression regulation | 168 | 25.8K | 17 | 15 |
| 130 | viruses | 395 | 25.7K | 23 | 28 |
| 131 | Statistics | 513 | 25.6K | 40 | 36 |
| 132 | Mathematics | 1,408 | 25.4K | 56 | 50 |
| 133 | Cerebral cortex | 203 | 25.3K | 13 | 4 |
| 134 | Developmental Disabilities | 332 | 25.2K | 4 | 2 |
| 135 | Host-parasite interactions | 216 | 24.6K | 18 | 16 |
| 136 | viral genetics | 134 | 24.2K | 12 | 14 |
| 137 | Social Sciences | 758 | 24.0K | 9 | 13 |
| 138 | fertility | 427 | 24.0K | 3 | 2 |
| 139 | Pathology | 443 | 23.9K | 27 | 29 |
| 140 | Animal Behavior | 307 | 23.8K | 60 | 35 |
| 141 | Infertility | 427 | 23.8K | 2 | 2 |
| 142 | Biochemical Engineering | 164 | 23.8K | 242 | 106 |
| 143 | drug addiction | 497 | 23.6K | 5 | 6 |
| 144 | Medical innovations | 181 | 23.4K | 13 | 10 |
| 145 | Economic History | 357 | 23.3K | 40 | 10 |
| 146 | drug development | 181 | 22.7K | 14 | 10 |
| 147 | Evolution | 300 | 22.5K | 34 | 45 |
| 148 | Earth Sciences | 176 | 22.4K | 189 | 46 |
| 149 | Environmental Policy | 194 | 21.9K | 106 | 38 |
| 150 | Medical Oncology | 572 | 21.9K | 13 | 22 |
| 151 | Pediatric Neurology | 167 | 21.7K | 22 | 21 |
| 152 | Cognitive Science | 242 | 21.6K | 7 | 11 |
| 153 | Materials Science | 304 | 21.5K | 283 | 174 |
| 154 | Catalysis | 358 | 21.5K | 193 | 148 |
| 155 | Aging | 567 | 21.4K | 33 | 39 |
| 156 | Transplantation | 303 | 21.3K | 29 | 19 |
| 157 | Medical Physics | 404 | 21.1K | 32 | 18 |
| 158 | Mathematical Physics | 327 | 20.5K | 96 | 32 |
| 159 | Developing countries | 261 | 20.4K | 29 | 10 |
| 160 | Computational Biology | 388 | 20.3K | 16 | 48 |
| 161 | Optics | 560 | 19.6K | 153 | 92 |
| 162 | DNA polymerases | 82 | 19.4K | 14 | 8 |
| 163 | Health Policy | 527 | 19.4K | 15 | 20 |
| 164 | Developmental Psychology | 276 | 19.3K | 6 | 9 |
| 165 | Biocompatible Materials | 275 | 18.8K | 228 | 183 |
| 166 | Chemical Engineering | 324 | 18.8K | 296 | 214 |
| 167 | Information Theory | 194 | 18.7K | 39 | 21 |
| 168 | Colloids | 240 | 18.5K | 259 | 98 |
| 169 | Learning | 244 | 18.5K | 13 | 8 |
| 170 | Meteorology | 294 | 17.9K | 94 | 87 |
| 171 | Molecular Genetics | 294 | 17.8K | 17 | 30 |
| 172 | Ethology | 187 | 17.7K | 78 | 32 |
| 173 | Histology | 213 | 17.6K | 38 | 16 |
| 174 | Radiobiology | 461 | 17.6K | 14 | 21 |
| 175 | Smoking | 386 | 17.4K | 3 | 2 |
| 176 | Critical Care Medicine | 248 | 17.4K | 38 | 48 |
| 177 | Critical Care | 251 | 17.3K | 35 | 47 |
| 178 | Organic Chemistry | 359 | 17.2K | 48 | 37 |
| 179 | Chromosome mapping | 335 | 17.0K | 3 | 6 |
| 180 | Mental Health | 471 | 16.6K | 5 | 7 |
| 181 | Medical Microbiology | 245 | 16.4K | 64 | 54 |
| 182 | pain | 201 | 16.2K | 39 | 31 |
| 183 | behavioral medicine | 244 | 16.2K | 16 | 18 |
| 184 | Crystallography | 45 | 16.2K | 311 | 14 |
| 185 | X-ray crystallography | 33 | 16.0K | 80 | 9 |
| 186 | Urology | 499 | 16.0K | 33 | 36 |
| 187 | Post-traumatic stress disorder | 165 | 15.9K | 7 | 2 |
| 188 | Genomics | 362 | 15.7K | 50 | 55 |
| 189 | arthritis | 219 | 15.3K | 32 | 28 |
| 190 | nanoscience | 152 | 15.2K | 208 | 127 |
| 191 | Molecular evolution | 257 | 15.1K | 10 | 35 |
| 192 | Plants | 136 | 15.0K | 110 | 61 |
| 193 | Surface Chemistry | 192 | 15.0K | 326 | 122 |
| 194 | Mathematical Economics | 106 | 14.8K | 3 | 9 |
| 195 | Adolescent | 681 | 14.7K | 10 | 19 |
| 196 | Bioinformatics | 292 | 14.6K | 18 | 50 |
| 197 | Biomedical Engineering | 302 | 14.6K | 220 | 151 |
| 198 | Photonics | 95 | 14.6K | 214 | 59 |
| 199 | Microbial Ecology | 114 | 14.6K | 183 | 100 |
| 200 | genome | 226 | 14.4K | 15 | 55 |
| 201 | Water | 133 | 14.4K | 180 | 86 |
| 202 | Virulence | 171 | 14.3K | 21 | 21 |
| 203 | Eating Disorders | 269 | 13.9K | 9 | 8 |
| 204 | Anxiety Disorders | 150 | 13.8K | 6 | 6 |
| 205 | Anxiety | 149 | 13.7K | 6 | 6 |
| 206 | Planets | 234 | 13.6K | 97 | 75 |
| 207 | Telecommunication | 145 | 13.6K | 203 | 102 |
| 208 | Oncogenes | 147 | 13.6K | 37 | 33 |
| 209 | Bioorganic chemistry | 270 | 13.5K | 41 | 36 |
| 210 | Feeding and Eating Disorders | 256 | 13.5K | 9 | 8 |
| 211 | drug therapy | 326 | 13.3K | 44 | 38 |
| 212 | mycoses | 87 | 13.2K | 13 | 11 |
| 213 | Light | 88 | 13.2K | 31 | 20 |
| 214 | Bacterial infections | 86 | 13.2K | 22 | 11 |
| 215 | Therapeutics | 325 | 13.1K | 19 | 30 |
| 215 | plant molecular biology | 100 | 13.1K | 133 | 79 |
| 217 | Spine | 176 | 12.9K | 11 | 5 |
| 218 | Health | 374 | 12.8K | 26 | 32 |
| 219 | Gerontology | 454 | 12.8K | 26 | 17 |
| 220 | proteins | 249 | 12.8K | 32 | 27 |
| 221 | Toxicology | 310 | 12.6K | 182 | 170 |
| 222 | Oceanography | 173 | 12.5K | 120 | 78 |
| 223 | marketing | 90 | 12.5K | 157 | 67 |
| 224 | Physical Chemistry | 213 | 12.5K | 77 | 59 |
| 225 | health behavior | 301 | 12.5K | 14 | 14 |
| 226 | Ophthalmology | 348 | 12.4K | 43 | 52 |
| 227 | Anthropology | 702 | 12.4K | 8 | 18 |
| 228 | human development | 166 | 12.3K | 8 | 5 |
| 229 | Environmental Toxicology | 100 | 12.3K | 128 | 31 |
| 230 | Biodiversity | 160 | 12.2K | 63 | 45 |
| 231 | Community Psychiatry | 360 | 12.0K | 4 | 6 |
| 232 | Biodiversity conservation | 123 | 12.0K | 91 | 94 |
| 233 | peace | 137 | 12.0K | 5 | 2 |
| 234 | Nutrition | 376 | 12.0K | 119 | 195 |
| 235 | nuclear magnetic resonance | 228 | 11.9K | 13 | 9 |
| 236 | Mental Health Services | 397 | 11.8K | 5 | 3 |
| 237 | Medical Anthropology | 185 | 11.7K | 35 | 29 |
| 238 | Thorax | 276 | 11.6K | 4 | 2 |
| 239 | Computational Chemistry | 47 | 11.6K | 18 | 20 |
| 240 | Clinical Chemistry | 335 | 11.2K | 52 | 82 |
| 241 | Radiography | 227 | 11.0K | 12 | 21 |
| 242 | Polymers | 240 | 11.0K | 414 | 290 |
| 243 | Nanostructures | 62 | 11.0K | 173 | 56 |
| 244 | Magnetic Resonance Spectroscopy | 210 | 10.8K | 13 | 8 |
| 245 | Medical Technology | 173 | 10.8K | 10 | 3 |
| 246 | commerce | 64 | 10.5K | 84 | 48 |
| 247 | Social behavior | 133 | 10.5K | 35 | 23 |
| 248 | Electronics | 267 | 10.3K | 170 | 135 |
| 249 | Sustainable Development | 69 | 10.3K | 95 | 25 |
| 250 | Climate change | 73 | 10.3K | 76 | 86 |
| 251 | medical education | 414 | 10.2K | 20 | 32 |
| 252 | protein | 171 | 10.2K | 22 | 26 |
| 253 | Atmospheric Physics | 85 | 10.2K | 218 | 96 |
| 254 | Neuropsychiatry | 180 | 10.2K | 8 | 6 |
| 255 | Diagnostic Imaging | 220 | 10.2K | 44 | 37 |
| 256 | Psycholinguistics | 157 | 10.1K | 24 | 28 |
| 257 | Combustion | 201 | 10.1K | 41 | 32 |
| 258 | Depression | 98 | 9.9K | 7 | 7 |
| 259 | Signal Processing | 139 | 9.9K | 245 | 151 |
| 260 | Disease | 18 | 9.7K | 34 | 35 |
| 261 | international trade | 50 | 9.7K | 21 | 3 |
| 262 | diseases | 20 | 9.6K | 27 | 36 |
| 263 | Computer Vision | 108 | 9.6K | 41 | 37 |
| 264 | Education | 459 | 9.5K | 83 | 130 |
| 265 | international cooperation | 110 | 9.5K | 3 | 2 |
| 266 | warfare | 104 | 9.4K | 5 | 2 |
| 267 | Eutrophication | 70 | 9.4K | 80 | 93 |
| 268 | Consciousness | 57 | 9.3K | 8 | 2 |
| 269 | Respiration | 212 | 9.3K | 45 | 53 |
| 270 | Emergency Medicine | 321 | 9.3K | 15 | 17 |
| 271 | Genetic engineering | 182 | 9.2K | 40 | 43 |
| 272 | miniaturization | 108 | 9.1K | 141 | 117 |
| 273 | War and Society | 97 | 9.1K | 2 | 2 |
| 274 | Radiology | 267 | 9.0K | 16 | 13 |
| 274 | Autism | 122 | 9.0K | 13 | 9 |
| 276 | Kidney diseases | 212 | 9.0K | 11 | 9 |
| 277 | Rheumatology | 155 | 8.9K | 30 | 33 |
| 277 | Organometallic compounds | 107 | 8.9K | 40 | 2 |
| 279 | organization | 62 | 8.9K | 52 | 42 |
| 280 | economic conditions | 102 | 8.9K | 13 | 3 |
| 281 | drug abuse | 225 | 8.8K | 4 | 2 |
| 282 | Imagination | 37 | 8.8K | 3 | 1 |
| 283 | economic policy | 164 | 8.7K | 58 | 22 |
| 284 | brain mapping | 130 | 8.7K | 7 | 13 |
| 285 | Economic Thought | 87 | 8.5K | 2 | 2 |
| 286 | preventive medicine | 190 | 8.5K | 28 | 40 |
| 287 | Climatology | 167 | 8.5K | 97 | 107 |
| 288 | behavior therapy | 144 | 8.4K | 25 | 13 |
| 289 | Paleontology | 192 | 8.4K | 29 | 11 |
| 290 | Development | 60 | 8.4K | 45 | 12 |
| 291 | RNA | 164 | 8.4K | 1 | 2 |
| 292 | Population Genetics | 95 | 8.3K | 78 | 57 |
| 293 | Molecular Microbiology | 99 | 8.3K | 36 | 34 |
| 293 | Microelectronics | 107 | 8.3K | 144 | 117 |
| 295 | Jurisprudence | 86 | 8.3K | 41 | 2 |
| 296 | world | 56 | 8.2K | 45 | 13 |
| 297 | Economic Assistance | 48 | 8.2K | 46 | 11 |
| 298 | Law | 120 | 8.2K | 53 | 3 |
| 299 | Health Services Administration | 184 | 8.2K | 11 | 12 |
| 300 | gene therapy | 114 | 8.0K | 36 | 24 |
| 301 | sustainability | 54 | 8.0K | 29 | 8 |
| 302 | Nephrology | 183 | 8.0K | 10 | 9 |
| 303 | Agriculture | 125 | 7.9K | 121 | 60 |
| 304 | Diagnostic microbiology | 106 | 7.8K | 54 | 55 |
| 305 | Energy Policy | 67 | 7.8K | 334 | 116 |
| 306 | Stem cells | 177 | 7.7K | 40 | 45 |
| 307 | Microorganisms | 43 | 7.6K | 90 | 34 |
| 308 | Molecular ecology | 76 | 7.6K | 89 | 61 |
| 309 | Nanostructured Materials | 171 | 7.5K | 246 | 233 |
| 310 | Adolescent Medicine | 130 | 7.5K | 18 | 24 |
| 311 | older people | 337 | 7.4K | 33 | 19 |
| 312 | System analysis | 98 | 7.4K | 176 | 40 |
| 313 | environmental pollution | 136 | 7.4K | 420 | 336 |
| 314 | energy resources | 59 | 7.3K | 105 | 42 |
| 315 | Harmonic Analysis | 69 | 7.3K | 1 | 1 |
| 316 | Orthopedics | 210 | 7.3K | 41 | 41 |
| 317 | epilepsy | 158 | 7.3K | 12 | 5 |
| 318 | management | 97 | 7.2K | 425 | 336 |
| 319 | Synapses | 92 | 7.2K | 1 | 1 |
| 320 | Health promotion | 198 | 7.2K | 37 | 46 |
| 321 | Health insurance | 134 | 7.2K | 12 | 14 |
| 322 | Psychosomatic Medicine | 127 | 7.1K | 19 | 28 |
| 323 | Cell death | 72 | 7.0K | 100 | 127 |
| 324 | Diet | 148 | 7.0K | 111 | 148 |
| 325 | Emotions | 95 | 6.9K | 10 | 14 |
| 326 | Astrocytes | 73 | 6.9K | 3 | 2 |
| 327 | Women's health | 222 | 6.9K | 16 | 13 |
| 328 | Linguistics | 153 | 6.9K | 51 | 38 |
| 329 | Plant physiology | 115 | 6.9K | 184 | 159 |
| 330 | Nonlinear Dynamics | 188 | 6.9K | 132 | 114 |
| 331 | Operations Research | 175 | 6.8K | 77 | 88 |
| 332 | Environmental monitoring | 126 | 6.8K | 272 | 230 |
| 333 | histological techniques | 95 | 6.7K | 4 | 6 |
| 334 | ecosystem | 82 | 6.7K | 60 | 39 |
| 335 | Chemotherapy | 99 | 6.7K | 69 | 18 |
| 336 | Image Processing | 115 | 6.6K | 177 | 150 |
| 337 | association | 28 | 6.6K | 3 | 2 |
| 337 | Organizations | 28 | 6.6K | 3 | 2 |
| 339 | Medical Laboratory Science | 121 | 6.5K | 110 | 109 |
| 340 | Analytical Biochemistry | 125 | 6.5K | 32 | 32 |
| 341 | Energy Conversion | 51 | 6.5K | 153 | 134 |
| 342 | Educational Psychology | 138 | 6.4K | 78 | 71 |
| 343 | feeding behavior | 107 | 6.4K | 17 | 15 |
| 344 | Classification | 14 | 6.3K | 54 | 3 |
| 345 | Microeconomics | 81 | 6.3K | 6 | 7 |
| 346 | Green Chemistry | 85 | 6.2K | 145 | 104 |
| 347 | environmental protection | 128 | 6.2K | 209 | 171 |
| 348 | Zoology | 208 | 6.2K | 87 | 90 |
| 349 | Health Education | 223 | 6.1K | 64 | 68 |
| 350 | Data Mining | 67 | 6.1K | 77 | 57 |
| 351 | Chromosomes | 88 | 6.0K | 32 | 12 |
| 352 | Water pollution | 65 | 6.0K | 432 | 210 |
| 353 | Metals | 115 | 6.0K | 183 | 154 |
| 354 | Cardiovascular diseases | 208 | 6.0K | 26 | 43 |
| 355 | enzymes | 190 | 5.9K | 16 | 32 |
| 356 | Phylogeny | 103 | 5.9K | 12 | 15 |
| 357 | blood transfusion | 210 | 5.8K | 11 | 9 |
| 358 | Europe | 205 | 5.8K | 159 | 134 |
| 359 | soil microbiology | 64 | 5.8K | 161 | 123 |
| 360 | Sleep Disorders | 201 | 5.8K | 43 | 69 |
| 361 | Psychiatric hospitals | 188 | 5.8K | 4 | 2 |
| 362 | Industrial Ecology | 87 | 5.7K | 2 | 1 |
| 363 | data collection | 61 | 5.7K | 33 | 34 |
| 364 | Sleep | 225 | 5.7K | 39 | 76 |
| 365 | Environmental Chemistry | 45 | 5.7K | 296 | 179 |
| 366 | Primates | 128 | 5.6K | 19 | 14 |
| 367 | Thrombosis | 136 | 5.6K | 29 | 53 |
| 368 | Hospitals | 185 | 5.6K | 8 | 7 |
| 369 | Alzheimer's disease | 212 | 5.6K | 66 | 72 |
| 370 | Vision | 90 | 5.6K | 55 | 40 |
| 371 | Biogeochemistry | 72 | 5.6K | 106 | 79 |
| 372 | Environmental Management | 74 | 5.6K | 315 | 171 |
| 373 | Heart Failure | 160 | 5.5K | 11 | 19 |
| 374 | Pharmacogenetics | 127 | 5.5K | 14 | 22 |
| 375 | Community Psychology | 143 | 5.5K | 8 | 22 |
| 376 | Archaeology | 145 | 5.4K | 58 | 45 |
| 377 | Plant Ecology | 92 | 5.4K | 148 | 133 |
| 378 | Vaccines | 169 | 5.4K | 55 | 62 |
| 379 | Research Design | 143 | 5.3K | 35 | 71 |
| 380 | Entomology | 121 | 5.3K | 168 | 81 |
| 381 | Public Policy | 195 | 5.3K | 32 | 53 |
| 381 | polymerization | 129 | 5.3K | 534 | 415 |
| 383 | Animal ecology | 68 | 5.3K | 125 | 61 |
| 384 | Personality Assessment | 85 | 5.2K | 14 | 18 |
| 385 | Engineering | 229 | 5.2K | 182 | 186 |
| 386 | Australia | 140 | 5.2K | 69 | 48 |
| 387 | health services | 202 | 5.1K | 16 | 19 |
| 388 | United Kingdom | 117 | 5.1K | 91 | 110 |
| 389 | vascular diseases | 120 | 5.0K | 16 | 42 |
| 390 | Hormones | 111 | 5.0K | 52 | 49 |
| 391 | Biomechanics | 97 | 5.0K | 91 | 84 |
| 392 | Bones | 66 | 5.0K | 40 | 31 |
| 393 | Technology | 112 | 5.0K | 413 | 278 |
| 394 | Decision making | 85 | 5.0K | 62 | 60 |
| 395 | Nursing | 211 | 4.9K | 36 | 38 |
| 396 | Immunopathology | 106 | 4.9K | 76 | 56 |
| 397 | Genetic therapy | 98 | 4.9K | 59 | 50 |
| 398 | Metallurgy | 109 | 4.8K | 234 | 194 |
| 399 | psychopathology | 74 | 4.8K | 6 | 22 |
| 399 | Social problems | 90 | 4.8K | 11 | 15 |
| 401 | Nuclear Medicine | 147 | 4.8K | 29 | 52 |
| 402 | Conservation Biology | 75 | 4.7K | 65 | 52 |
| 403 | rehabilitation | 118 | 4.7K | 144 | 140 |
| 404 | Personality Disorders | 52 | 4.7K | 15 | 4 |
| 405 | Intelligence | 62 | 4.7K | 7 | 9 |
| 406 | Forest Management | 103 | 4.7K | 58 | 50 |
| 407 | Welfare Economics | 53 | 4.6K | 16 | 10 |
| 408 | Health Services Research | 151 | 4.6K | 69 | 90 |
| 409 | Analytical Chemistry | 113 | 4.6K | 670 | 558 |
| 410 | Adolescent Psychology | 99 | 4.5K | 24 | 23 |
| 411 | Game Theory | 71 | 4.5K | 13 | 12 |
| 412 | Communication | 92 | 4.5K | 190 | 147 |
| 413 | Forest Ecology | 87 | 4.5K | 74 | 52 |
| 414 | Recombinant DNA | 119 | 4.5K | 29 | 29 |
| 415 | Food | 78 | 4.5K | 365 | 239 |
| 416 | Political Sociology | 64 | 4.4K | 16 | 10 |
| 417 | Philosophy | 264 | 4.4K | 45 | 39 |
| 418 | Molecular cloning | 106 | 4.3K | 27 | 30 |
| 419 | Mass Spectrometry | 54 | 4.3K | 126 | 29 |
| 420 | Genetic recombination | 105 | 4.3K | 26 | 29 |
| 421 | Biomolecules | 22 | 4.3K | 52 | 8 |
| 422 | Aerosols | 116 | 4.3K | 12 | 19 |
| 423 | child abuse | 138 | 4.2K | 13 | 39 |
| 424 | biopolymers | 79 | 4.2K | 102 | 49 |
| 425 | Bipolar Disorder | 84 | 4.2K | 12 | 21 |
| 426 | Speech Disorders | 96 | 4.2K | 100 | 63 |
| 427 | Experimental Psychology | 53 | 4.2K | 46 | 34 |
| 428 | Biogeography | 60 | 4.1K | 75 | 77 |
| 429 | Dementia | 193 | 4.1K | 68 | 76 |
| 430 | Structure-activity relationship | 19 | 4.1K | 14 | 7 |
| 431 | Fluid Mechanics | 101 | 4.1K | 111 | 83 |
| 432 | Microscopy | 104 | 4.1K | 30 | 32 |
| 433 | Robotics | 77 | 4.1K | 146 | 87 |
| 434 | Soft Condensed Matter | 78 | 4.1K | 96 | 55 |
| 435 | Cybernetics | 47 | 4.0K | 250 | 142 |
| 436 | Machine Learning | 19 | 4.0K | 50 | 24 |
| 437 | International Relations | 87 | 4.0K | 77 | 26 |
| 438 | Biometrics | 218 | 4.0K | 20 | 71 |
| 439 | Elderly | 260 | 4.0K | 33 | 12 |
| 440 | Proteome | 65 | 4.0K | 78 | 69 |
| 441 | International security | 38 | 4.0K | 11 | 10 |
| 442 | Clinical Immunology | 108 | 3.9K | 49 | 44 |
| 443 | Appetite | 52 | 3.9K | 38 | 22 |
| 444 | Environmental Law | 56 | 3.8K | 87 | 88 |
| 445 | Socialization | 45 | 3.8K | 30 | 10 |
| 446 | Sound | 43 | 3.8K | 148 | 40 |
| 447 | violence | 149 | 3.8K | 14 | 48 |
| 448 | Comparative Physiology | 91 | 3.8K | 35 | 34 |
| 449 | language | 83 | 3.7K | 39 | 35 |
| 450 | cytokines | 39 | 3.7K | 135 | 41 |
| 451 | Drug design | 72 | 3.7K | 54 | 44 |
| 452 | role | 39 | 3.7K | 21 | 4 |
| 453 | Marine Biology | 76 | 3.7K | 412 | 292 |
| 453 | Sports Medicine | 120 | 3.7K | 227 | 248 |
| 455 | Parasitology | 121 | 3.6K | 122 | 125 |
| 456 | Portfolio Management | 66 | 3.6K | 4 | 2 |
| 457 | Drug delivery systems | 36 | 3.6K | 237 | 115 |
| 458 | Radio | 88 | 3.6K | 162 | 186 |
| 459 | Electrophysiology | 129 | 3.6K | 29 | 23 |
| 460 | Geography | 87 | 3.5K | 242 | 208 |
| 461 | Neuroimmunology | 55 | 3.5K | 36 | 37 |
| 462 | Morphology | 84 | 3.5K | 29 | 15 |
| 463 | infection | 61 | 3.5K | 179 | 120 |
| 464 | Human evolution | 96 | 3.5K | 16 | 34 |
| 465 | Speech | 72 | 3.5K | 78 | 60 |
| 466 | Child welfare | 112 | 3.4K | 37 | 31 |
| 467 | Information Science | 49 | 3.4K | 385 | 193 |
| 468 | Political Psychology | 45 | 3.4K | 13 | 14 |
| 469 | Psychoanalysis | 158 | 3.4K | 6 | 6 |
| 470 | Reproductive health | 72 | 3.4K | 23 | 11 |
| 471 | Recycling | 52 | 3.4K | 23 | 26 |
| 472 | Digestive system diseases | 148 | 3.4K | 11 | 23 |
| 473 | Autoimmunity | 58 | 3.3K | 46 | 48 |
| 474 | Development Economics | 31 | 3.3K | 22 | 9 |
| 475 | cloning | 55 | 3.3K | 23 | 36 |
| 476 | Investments | 65 | 3.3K | 15 | 3 |
| 477 | Psychoneuroimmunology | 48 | 3.3K | 41 | 36 |
| 478 | Acoustics | 30 | 3.3K | 42 | 15 |
| 479 | Signal Transduction | 71 | 3.3K | 98 | 148 |
| 480 | Speech acoustics | 25 | 3.3K | 20 | 15 |
| 481 | Environmental Microbiology | 26 | 3.3K | 308 | 147 |
| 482 | Paleoecology | 62 | 3.3K | 108 | 62 |
| 483 | Medical Ethics | 254 | 3.2K | 10 | 22 |
| 484 | Systems Biology | 124 | 3.2K | 33 | 67 |
| 485 | Renewable Energy Sources | 33 | 3.2K | 633 | 476 |
| 486 | Database Management | 31 | 3.2K | 158 | 63 |
| 487 | Statistical Mechanics | 93 | 3.2K | 37 | 32 |
| 488 | Molecular Imaging | 68 | 3.1K | 54 | 56 |
| 489 | Birds | 108 | 3.1K | 65 | 43 |
| 490 | Biogeochemical cycles | 36 | 3.1K | 53 | 57 |
| 491 | Cytoskeleton | 66 | 3.1K | 1 | 1 |
| 492 | Neuroimaging | 114 | 3.1K | 2 | 4 |
| 493 | Primary health care | 128 | 3.1K | 78 | 100 |
| 494 | Mineralogy | 104 | 3.1K | 121 | 178 |
| 495 | chronic disease | 105 | 3.1K | 8 | 10 |
| 496 | Quantum theory | 63 | 3.1K | 77 | 35 |
| 497 | Wildlife conservation | 44 | 3.1K | 160 | 127 |
| 498 | Infections | 46 | 3.0K | 145 | 115 |
| 499 | probabilities | 87 | 3.0K | 121 | 37 |
| 500 | aerosol | 76 | 3.0K | 14 | 10 |
| 501 | Proteomics | 50 | 3.0K | 82 | 69 |
| 502 | Paleoclimatology | 49 | 3.0K | 166 | 102 |
| 503 | Autoimmune diseases | 54 | 3.0K | 29 | 26 |
| 504 | environmental exposure | 82 | 3.0K | 98 | 103 |
| 505 | Labor Economics | 22 | 3.0K | 71 | 17 |
| 506 | Soil biology | 31 | 3.0K | 206 | 140 |
| 506 | scientific societies | 90 | 3.0K | 18 | 23 |
| 508 | adolescence | 91 | 3.0K | 53 | 85 |
| 509 | plant communities | 53 | 2.9K | 137 | 148 |
| 510 | Leukemia | 95 | 2.9K | 74 | 165 |
| 511 | Demography | 63 | 2.9K | 45 | 44 |
| 512 | Magnetohydrodynamics | 86 | 2.9K | 25 | 22 |
| 513 | Paleogeography | 47 | 2.9K | 129 | 68 |
| 514 | Autoantibodies | 50 | 2.9K | 28 | 23 |
| 515 | income distribution | 7 | 2.9K | 48 | 7 |
| 516 | Insects | 41 | 2.9K | 209 | 76 |
| 517 | Bioethics | 190 | 2.9K | 12 | 17 |
| 518 | drugs | 96 | 2.9K | 148 | 171 |
| 519 | Atmospheric Chemistry | 51 | 2.9K | 180 | 192 |
| 520 | computer networks | 69 | 2.8K | 305 | 208 |
| 521 | Steroids | 72 | 2.8K | 60 | 44 |
| 522 | Computer Graphics | 97 | 2.8K | 148 | 174 |
| 523 | Leadership | 18 | 2.8K | 89 | 46 |
| 524 | Cytokine | 23 | 2.8K | 31 | 9 |
| 525 | Clinical Biochemistry | 68 | 2.8K | 78 | 67 |
| 526 | homosexuality | 40 | 2.7K | 23 | 9 |
| 527 | health planning | 102 | 2.7K | 98 | 92 |
| 528 | Social work | 217 | 2.7K | 46 | 83 |
| 529 | conflict management | 31 | 2.7K | 12 | 6 |
| 530 | weather | 30 | 2.7K | 33 | 7 |
| 531 | Suicide | 48 | 2.7K | 26 | 10 |
| 532 | Lipids | 47 | 2.6K | 157 | 135 |
| 532 | heredity | 101 | 2.6K | 9 | 21 |
| 534 | Melanoma | 36 | 2.6K | 5 | 2 |
| 535 | Information Systems | 61 | 2.6K | 70 | 61 |
| 536 | Family | 79 | 2.6K | 75 | 72 |
| 537 | mental processes | 112 | 2.6K | 2 | 3 |
| 538 | children | 46 | 2.6K | 19 | 19 |
| 539 | Optical materials | 46 | 2.6K | 604 | 482 |
| 540 | Muscles | 47 | 2.6K | 79 | 64 |
| 541 | Hydrology | 61 | 2.5K | 358 | 322 |
| 542 | China | 92 | 2.5K | 265 | 199 |
| 543 | Family Therapy | 80 | 2.5K | 32 | 27 |
| 544 | Neuropharmacology | 69 | 2.5K | 6 | 14 |
| 545 | embryo transfer | 86 | 2.5K | 5 | 4 |
| 546 | Endocrine glands | 33 | 2.5K | 8 | 19 |
| 547 | Hippocampus | 32 | 2.5K | 21 | 25 |
| 548 | Urban Economics | 26 | 2.5K | 47 | 25 |
| 549 | Neuromuscular diseases | 42 | 2.5K | 64 | 42 |
| 550 | disease vectors | 53 | 2.5K | 61 | 54 |
| 551 | Growth factors | 10 | 2.5K | 57 | 11 |
| 552 | Radiation | 106 | 2.5K | 116 | 131 |
| 553 | Histochemistry | 55 | 2.5K | 71 | 41 |
| 554 | Databases | 20 | 2.5K | 105 | 34 |
| 555 | Algebra | 134 | 2.5K | 55 | 24 |
| 556 | Microcirculation | 48 | 2.5K | 13 | 11 |
| 557 | Genetic epidemiology | 95 | 2.4K | 8 | 16 |
| 557 | Molecules | 66 | 2.4K | 227 | 160 |
| 559 | Control Theory | 25 | 2.4K | 570 | 179 |
| 560 | mammals | 68 | 2.4K | 59 | 39 |
| 561 | Molecular Pharmacology | 63 | 2.4K | 42 | 64 |
| 562 | child mental health | 70 | 2.4K | 9 | 4 |
| 563 | optical instruments | 66 | 2.4K | 24 | 27 |
| 564 | Global Health | 92 | 2.3K | 40 | 36 |
| 565 | drug control | 88 | 2.3K | 13 | 19 |
| 566 | Sexual health | 60 | 2.3K | 56 | 50 |
| 567 | cell membrane | 44 | 2.3K | 80 | 70 |
| 568 | Paleoceanography | 26 | 2.3K | 29 | 22 |
| 569 | Criminology | 72 | 2.3K | 97 | 85 |
| 570 | counseling | 94 | 2.3K | 125 | 135 |
| 571 | Ethnology | 127 | 2.3K | 50 | 54 |
| 572 | preimplantation genetic diagnosis | 65 | 2.2K | 10 | 4 |
| 573 | Bioenergetics | 35 | 2.2K | 125 | 85 |
| 574 | Parasitic Diseases | 69 | 2.2K | 167 | 195 |
| 575 | Social perception | 26 | 2.2K | 7 | 8 |
| 576 | Energy metabolism | 34 | 2.2K | 111 | 75 |
| 577 | General Surgery | 115 | 2.2K | 34 | 37 |
| 578 | urban health | 45 | 2.2K | 18 | 14 |
| 579 | global environmental change | 38 | 2.2K | 81 | 96 |
| 580 | Ornithology | 69 | 2.2K | 74 | 45 |
| 581 | water supply | 36 | 2.2K | 177 | 152 |
| 582 | mental health policy | 86 | 2.2K | 1 | 12 |
| 583 | Sustainable Engineering | 45 | 2.2K | 227 | 221 |
| 584 | Psychiatric Epidemiology | 55 | 2.2K | 22 | 29 |
| 585 | eugenics | 72 | 2.2K | 17 | 15 |
| 586 | Carcinogenesis | 46 | 2.2K | 93 | 93 |
| 587 | Hemodynamics | 47 | 2.2K | 82 | 112 |
| 588 | prostaglandins | 37 | 2.2K | 31 | 10 |
| 589 | Business | 59 | 2.1K | 302 | 482 |
| 590 | labor | 25 | 2.1K | 29 | 19 |
| 591 | cell interaction | 40 | 2.1K | 88 | 57 |
| 592 | Nuclear Energy | 28 | 2.1K | 215 | 51 |
| 593 | Lung Transplantation | 35 | 2.1K | 71 | 52 |
| 593 | occupational diseases | 56 | 2.1K | 59 | 63 |
| 593 | Heart transplantation | 35 | 2.1K | 71 | 52 |
| 596 | North America | 98 | 2.1K | 34 | 30 |
| 597 | cell movement | 31 | 2.1K | 16 | 6 |
| 598 | Inflammation | 27 | 2.0K | 202 | 102 |
| 599 | Neurolinguistics | 38 | 2.0K | 34 | 35 |
| 599 | Parasites | 65 | 2.0K | 110 | 119 |
| 601 | energy development | 12 | 2.0K | 253 | 144 |
| 602 | Synaptic Transmission | 32 | 2.0K | 48 | 20 |
| 603 | working class | 23 | 2.0K | 18 | 20 |
| 604 | Organizational Behavior | 20 | 2.0K | 146 | 95 |
| 605 | Otolaryngology | 81 | 2.0K | 40 | 46 |
| 605 | Risk | 20 | 2.0K | 105 | 45 |
| 607 | Clinical Trials | 90 | 2.0K | 21 | 37 |
| 607 | Photochemistry | 61 | 2.0K | 123 | 147 |
| 609 | Maternal health services | 60 | 2.0K | 19 | 14 |
| 610 | Agricultural Ecology | 29 | 2.0K | 175 | 162 |
| 611 | families | 56 | 2.0K | 78 | 54 |
| 612 | motivation | 28 | 2.0K | 31 | 22 |
| 613 | nuclear magnetic resonance spectroscopy | 38 | 2.0K | 82 | 37 |
| 614 | Geodynamics | 34 | 1.9K | 199 | 152 |
| 615 | Developmental Neurobiology | 34 | 1.9K | 29 | 9 |
| 616 | Biomass Energy | 25 | 1.9K | 721 | 520 |
| 617 | visualization | 188 | 1.9K | 32 | 86 |
| 618 | Genes | 65 | 1.9K | 66 | 70 |
| 619 | Gender Studies | 20 | 1.9K | 61 | 10 |
| 619 | Industrial Microbiology | 31 | 1.9K | 403 | 309 |
| 621 | Wireless Communication Systems | 39 | 1.9K | 581 | 363 |
| 622 | cardiac catheterization | 100 | 1.9K | 22 | 34 |
| 623 | Quality of life | 51 | 1.9K | 132 | 170 |
| 624 | Plant diseases | 25 | 1.9K | 601 | 268 |
| 625 | Geometry | 88 | 1.9K | 73 | 27 |
| 626 | Queer Studies | 14 | 1.9K | 38 | 9 |
| 627 | health services accessibility | 102 | 1.9K | 27 | 70 |
| 628 | intergroup relations | 23 | 1.9K | 13 | 6 |
| 629 | Soil Science | 24 | 1.8K | 547 | 282 |
| 630 | Probability | 28 | 1.8K | 76 | 42 |
| 631 | School Psychology | 39 | 1.8K | 67 | 49 |
| 632 | Oxidation-reduction | 26 | 1.8K | 137 | 163 |
| 633 | Criminal psychology | 49 | 1.8K | 99 | 91 |
| 634 | software | 30 | 1.8K | 126 | 54 |
| 635 | International Finance | 38 | 1.8K | 303 | 175 |
| 636 | Physical Therapy | 38 | 1.8K | 218 | 190 |
| 637 | Japan | 42 | 1.8K | 246 | 109 |
| 638 | Cognitive Therapy | 60 | 1.8K | 21 | 40 |
| 639 | Neurosurgery | 83 | 1.7K | 35 | 126 |
| 640 | Dyslexia | 5 | 1.7K | 86 | 1 |
| 641 | Teaching | 79 | 1.7K | 160 | 208 |
| 642 | sexual behavior | 45 | 1.7K | 63 | 62 |
| 643 | Functional Analysis | 39 | 1.7K | 247 | 91 |
| 644 | Human biology | 70 | 1.7K | 18 | 25 |
| 645 | Ventilation | 21 | 1.7K | 93 | 31 |
| 646 | Social Change | 25 | 1.7K | 151 | 138 |
| 647 | Zoonoses | 28 | 1.7K | 14 | 7 |
| 648 | Antioxidants | 23 | 1.7K | 116 | 123 |
| 649 | Documentation | 17 | 1.7K | 51 | 22 |
| 649 | Europa | 20 | 1.7K | 102 | 29 |
| 651 | Geriatric Oncology | 46 | 1.7K | 32 | 36 |
| 652 | behavior modification | 30 | 1.7K | 82 | 78 |
| 653 | child behavior | 46 | 1.7K | 19 | 30 |
| 654 | Nanoparticles | 33 | 1.7K | 398 | 295 |
| 655 | Ethics | 79 | 1.7K | 29 | 35 |
| 656 | Aggression | 59 | 1.6K | 6 | 44 |
| 657 | Public opinion | 18 | 1.6K | 77 | 25 |
| 657 | DNA repair | 42 | 1.6K | 10 | 20 |
| 659 | carcinogens | 33 | 1.6K | 137 | 125 |
| 660 | Solar System | 75 | 1.6K | 91 | 148 |
| 661 | drug evaluation | 39 | 1.6K | 140 | 70 |
| 662 | energy conservation | 14 | 1.6K | 851 | 480 |
| 663 | Phonetics | 37 | 1.6K | 25 | 18 |
| 664 | Petrology | 36 | 1.6K | 263 | 259 |
| 665 | immigration | 7 | 1.6K | 82 | 13 |
| 665 | migration policy | 7 | 1.6K | 91 | 13 |
| 665 | Asylum seeker | 7 | 1.6K | 67 | 13 |
| 668 | Energy Storage | 28 | 1.6K | 265 | 198 |
| 668 | Chromatographic analysis | 64 | 1.6K | 188 | 147 |
| 670 | Environmental Economics | 19 | 1.6K | 43 | 25 |
| 670 | air quality management | 17 | 1.6K | 69 | 31 |
| 670 | Radiotherapy | 77 | 1.6K | 18 | 13 |
| 670 | indoor air pollution | 17 | 1.6K | 70 | 29 |
| 670 | Sick building syndrome | 17 | 1.6K | 70 | 29 |
| 675 | Chromatography | 61 | 1.6K | 133 | 117 |
| 676 | Biochemical Genetics | 34 | 1.6K | 11 | 4 |
| 677 | Communication in medicine | 35 | 1.6K | 74 | 49 |
| 678 | Occupational Health | 63 | 1.6K | 72 | 84 |
| 679 | Culture | 106 | 1.6K | 29 | 55 |
| 680 | ethanol | 51 | 1.6K | 29 | 22 |
| 681 | Investment analysis | 24 | 1.6K | 105 | 46 |
| 682 | Mycology | 57 | 1.6K | 204 | 279 |
| 683 | Tropical Medicine | 114 | 1.6K | 64 | 160 |
| 684 | Numerical Analysis | 44 | 1.6K | 490 | 269 |
| 685 | urban population | 20 | 1.6K | 34 | 32 |
| 686 | Audiology | 41 | 1.5K | 132 | 120 |
| 687 | free radicals | 29 | 1.5K | 298 | 332 |
| 688 | Forensic Genetics | 21 | 1.5K | 42 | 27 |
| 689 | Immunochemistry | 59 | 1.5K | 42 | 70 |
| 689 | Ecosystem management | 24 | 1.5K | 102 | 80 |
| 691 | Quantum Computing | 29 | 1.5K | 15 | 12 |
| 692 | consumer behavior | 35 | 1.5K | 37 | 63 |
| 693 | Electrochemistry | 138 | 1.5K | 569 | 905 |
| 694 | Natural resources | 23 | 1.5K | 156 | 111 |
| 695 | Geobiology | 32 | 1.5K | 47 | 31 |
| 696 | Nuclear Chemistry | 16 | 1.5K | 382 | 48 |
| 697 | thinking | 22 | 1.5K | 17 | 12 |
| 698 | Genetic Research | 34 | 1.5K | 2 | 5 |
| 699 | Hearing | 49 | 1.5K | 101 | 83 |
| 700 | Dietetics | 51 | 1.5K | 67 | 59 |
| 700 | Youth | 46 | 1.5K | 67 | 97 |
| 702 | Quality Control | 32 | 1.5K | 275 | 171 |
| 703 | Language Disorders | 46 | 1.4K | 136 | 108 |
| 703 | Combinatorial analysis | 43 | 1.4K | 151 | 56 |
| 703 | Developed countries | 53 | 1.4K | 2 | 9 |
| 706 | Human-Computer Interaction | 43 | 1.4K | 162 | 166 |
| 707 | Distributed Databases | 16 | 1.4K | 21 | 4 |
| 707 | Extracellular matrix | 15 | 1.4K | 42 | 35 |
| 707 | collagen | 15 | 1.4K | 49 | 35 |
| 710 | Energy Harvesting | 20 | 1.4K | 101 | 131 |
| 711 | Geriatric Psychiatry | 56 | 1.4K | 67 | 111 |
| 712 | Orthopedic Surgery | 52 | 1.4K | 62 | 59 |
| 713 | mutagens | 28 | 1.4K | 134 | 143 |
| 714 | Behavioral Genetics | 34 | 1.4K | 20 | 28 |
| 715 | Experimental Design | 25 | 1.4K | 44 | 47 |
| 716 | Radiochemistry | 14 | 1.4K | 351 | 41 |
| 717 | Risk Management | 20 | 1.4K | 122 | 60 |
| 718 | Atomic spectroscopy | 34 | 1.4K | 208 | 127 |
| 719 | Software Engineering | 14 | 1.4K | 405 | 158 |
| 719 | Pediatric Dermatology | 69 | 1.4K | 19 | 21 |
| 721 | Cosmochemistry | 31 | 1.3K | 149 | 134 |
| 721 | crime | 34 | 1.3K | 111 | 83 |
| 723 | Corporate governance | 15 | 1.3K | 86 | 25 |
| 724 | Intellectual disability | 32 | 1.3K | 161 | 118 |
| 725 | Insect biochemistry | 17 | 1.3K | 111 | 48 |
| 726 | Cerebellum | 28 | 1.3K | 22 | 28 |
| 726 | Cerebellar ataxia | 28 | 1.3K | 22 | 28 |
| 728 | Comparative Psychology | 15 | 1.3K | 20 | 10 |
| 729 | Radioisotopes | 83 | 1.3K | 43 | 53 |
| 730 | government | 152 | 1.3K | 20 | 87 |
| 731 | Nuclear non-proliferation | 10 | 1.3K | 20 | 16 |
| 732 | Learning disabilities | 33 | 1.3K | 155 | 113 |
| 732 | liver | 53 | 1.3K | 6 | 6 |
| 734 | Blood vessels | 31 | 1.3K | 15 | 15 |
| 735 | Biopharmaceutics | 22 | 1.3K | 253 | 160 |
| 736 | Financial management | 13 | 1.3K | 124 | 60 |
| 737 | Nuclear Engineering | 134 | 1.3K | 110 | 174 |
| 738 | Geomagnetism | 58 | 1.3K | 73 | 98 |
| 739 | individual differences | 25 | 1.3K | 22 | 23 |
| 740 | Bone diseases | 19 | 1.3K | 84 | 103 |
| 741 | Culture techniques | 44 | 1.3K | 11 | 17 |
| 742 | complementary therapies | 72 | 1.3K | 81 | 149 |
| 743 | Psychiatric Nursing | 70 | 1.3K | 20 | 26 |
| 744 | Fisheries | 37 | 1.3K | 298 | 271 |
| 745 | Social Issues | 38 | 1.3K | 13 | 28 |
| 746 | Metastasis | 14 | 1.3K | 19 | 33 |
| 747 | mathematical analysis | 73 | 1.3K | 421 | 347 |
| 748 | Population | 39 | 1.2K | 96 | 119 |
| 749 | Systems Engineering | 11 | 1.2K | 1118 | 369 |
| 750 | atmospheric models | 18 | 1.2K | 215 | 166 |
| 751 | Psychometrics | 21 | 1.2K | 117 | 105 |
| 752 | Genetic disorders | 28 | 1.2K | 83 | 56 |
| 753 | Input-output analysis | 36 | 1.2K | 4 | 14 |
| 754 | Patient education | 46 | 1.2K | 59 | 105 |
| 754 | healthcare disparities | 61 | 1.2K | 20 | 31 |
| 756 | Menopause | 51 | 1.2K | 11 | 19 |
| 757 | Organic Geochemistry | 20 | 1.2K | 83 | 74 |
| 758 | Fluid Dynamics | 29 | 1.2K | 265 | 188 |
| 758 | Politics | 149 | 1.2K | 10 | 72 |
| 760 | Geochemical Modeling | 10 | 1.2K | 104 | 68 |
| 760 | geological modeling | 10 | 1.2K | 172 | 69 |
| 762 | school psychologists | 18 | 1.2K | 50 | 38 |
| 763 | Public Health Administration | 60 | 1.2K | 43 | 37 |
| 764 | biological factors | 28 | 1.2K | 454 | 359 |
| 765 | Urban Policy | 14 | 1.2K | 258 | 100 |
| 766 | Molecular Spectroscopy | 34 | 1.2K | 368 | 244 |
| 766 | Informatics | 26 | 1.2K | 118 | 104 |
| 768 | Pharmacy | 40 | 1.2K | 425 | 425 |
| 768 | calcification | 34 | 1.2K | 49 | 79 |
| 770 | History of Medicine | 91 | 1.2K | 6 | 4 |
| 771 | income | 33 | 1.2K | 2 | 5 |
| 771 | natural products | 35 | 1.2K | 357 | 274 |
| 771 | Wealth | 33 | 1.2K | 2 | 5 |
| 774 | Scandinavia | 41 | 1.2K | 61 | 76 |
| 775 | ethnicity | 44 | 1.1K | 39 | 22 |
| 775 | Body Image | 6 | 1.1K | 131 | 27 |
| 777 | Immunogenetics | 25 | 1.1K | 121 | 80 |
| 778 | Photography | 162 | 1.1K | 138 | 72 |
| 779 | History | 159 | 1.1K | 57 | 31 |
| 780 | Obsessive-Compulsive Disorder | 30 | 1.1K | 5 | 1 |
| 781 | Pharmacognosy | 33 | 1.1K | 408 | 447 |
| 782 | Asthma | 33 | 1.1K | 53 | 49 |
| 783 | Transportation | 14 | 1.1K | 691 | 395 |
| 784 | Creativity | 25 | 1.1K | 11 | 11 |
| 785 | Democracy | 39 | 1.1K | 9 | 8 |
| 786 | Magnetic Resonance Imaging | 34 | 1.1K | 51 | 49 |
| 786 | Sites | 28 | 1.1K | 103 | 125 |
| 788 | Law and Economics | 38 | 1.1K | 10 | 5 |
| 788 | Randomized Controlled Trials | 58 | 1.1K | 90 | 88 |
| 790 | Performance | 18 | 1.1K | 51 | 39 |
| 791 | Respiratory system | 40 | 1.1K | 46 | 72 |
| 792 | Antigens | 31 | 1.1K | 131 | 124 |
| 793 | Neonatology | 25 | 1.1K | 81 | 52 |
| 794 | fuel cells | 14 | 1.1K | 530 | 418 |
| 795 | Palliative Care | 50 | 1.1K | 79 | 99 |
| 796 | Malaria | 20 | 1.0K | 148 | 94 |
| 797 | Hemostasis | 38 | 1.0K | 85 | 84 |
| 798 | mutation | 24 | 1.0K | 101 | 96 |
| 799 | Hazardous waste | 16 | 1.0K | 251 | 207 |
| 800 | Plant Genetics | 16 | 1.0K | 219 | 218 |
| 801 | Sports | 48 | 1.0K | 433 | 493 |
| 802 | sex crimes | 56 | 1.0K | 36 | 67 |
| 803 | Topology | 35 | 1.0K | 25 | 9 |
| 803 | Government policy | 13 | 1.0K | 30 | 22 |
| 805 | Forensic Psychiatry | 42 | 991 | 56 | 55 |
| 806 | Behavioral research | 28 | 990 | 21 | 17 |
| 807 | Breeding | 33 | 977 | 247 | 251 |
| 808 | Industrial Policy | 19 | 976 | 92 | 68 |
| 809 | Solid State Chemistry | 52 | 967 | 524 | 595 |
| 810 | Mobile Computing | 16 | 961 | 368 | 204 |
| 811 | Combinatorial chemistry | 21 | 959 | 163 | 192 |
| 812 | Parallel Processing | 6 | 951 | 295 | 115 |
| 813 | Electrical Engineering | 98 | 950 | 435 | 569 |
| 814 | embryonic development | 19 | 949 | 67 | 47 |
| 815 | risk factors | 43 | 946 | 67 | 131 |
| 816 | lasers | 38 | 941 | 479 | 421 |
| 817 | Group decision making | 19 | 936 | 81 | 62 |
| 818 | Special Education | 25 | 931 | 171 | 114 |
| 818 | Plant breeding | 33 | 931 | 97 | 106 |
| 820 | Superconductors | 49 | 928 | 155 | 131 |
| 821 | Lipid metabolism | 14 | 925 | 92 | 74 |
| 821 | Lipid | 14 | 925 | 92 | 75 |
| 823 | Neural circuitry | 25 | 923 | 553 | 527 |
| 824 | Quantum Optics | 30 | 920 | 158 | 120 |
| 825 | California | 40 | 919 | 49 | 60 |
| 826 | Cell communication | 11 | 918 | 170 | 80 |
| 827 | Alternative Medicine | 48 | 916 | 131 | 206 |
| 828 | Public Choice | 18 | 912 | 68 | 50 |
| 829 | Virtual reality | 11 | 911 | 117 | 37 |
| 829 | Algae | 17 | 911 | 255 | 169 |
| 831 | touch | 9 | 907 | 39 | 7 |
| 832 | eye | 9 | 905 | 64 | 112 |
| 833 | Laser Spectroscopy | 29 | 903 | 133 | 101 |
| 834 | monitoring | 27 | 902 | 8 | 4 |
| 835 | industrial hygiene | 50 | 901 | 62 | 47 |
| 836 | Retina | 8 | 899 | 62 | 109 |
| 836 | Pediatric Nursing | 37 | 899 | 35 | 41 |
| 838 | family violence | 34 | 895 | 30 | 64 |
| 839 | sustainable forestry | 67 | 893 | 1 | 1 |
| 839 | optical phenomena | 19 | 893 | 7 | 6 |
| 841 | Liposomes | 26 | 891 | 66 | 124 |
| 842 | Cognitive Behavioral Therapy | 20 | 889 | 18 | 9 |
| 843 | Industrial Organization | 16 | 888 | 54 | 32 |
| 844 | Humanities | 51 | 887 | 91 | 99 |
| 845 | Antibodies | 27 | 884 | 93 | 104 |
| 846 | Lipid bilayers | 22 | 876 | 77 | 117 |
| 847 | Restoration Ecology | 17 | 874 | 83 | 60 |
| 847 | Protein engineering | 45 | 874 | 3 | 34 |
| 849 | Quantum Communication | 10 | 872 | 56 | 30 |
| 850 | Asia | 68 | 866 | 229 | 389 |
| 851 | Wetland ecology | 10 | 865 | 136 | 39 |
| 852 | city planning | 37 | 863 | 299 | 359 |
| 853 | Regional Planning | 32 | 859 | 370 | 375 |
| 854 | coal | 23 | 857 | 477 | 523 |
| 855 | Music | 44 | 852 | 84 | 90 |
| 856 | Landscape Ecology | 18 | 847 | 79 | 102 |
| 857 | Marine Meteorology | 27 | 846 | 79 | 108 |
| 857 | Seaweed | 15 | 846 | 184 | 136 |
| 859 | Hydraulic Engineering | 9 | 843 | 474 | 205 |
| 860 | Adaptive control systems | 18 | 840 | 124 | 27 |
| 861 | Biosensors | 14 | 838 | 523 | 500 |
| 862 | Lymphoma | 52 | 837 | 12 | 14 |
| 863 | Democratization | 11 | 835 | 18 | 5 |
| 864 | International Law | 32 | 831 | 42 | 5 |
| 865 | Pharmaceutical Technology | 17 | 822 | 549 | 397 |
| 866 | animals | 27 | 818 | 254 | 171 |
| 867 | Political Participation | 26 | 815 | 41 | 49 |
| 868 | Autonomous robots | 7 | 813 | 75 | 31 |
| 869 | Knowledge | 30 | 812 | 79 | 59 |
| 870 | forest policy | 27 | 802 | 60 | 47 |
| 871 | Bioelectronics | 11 | 800 | 508 | 454 |
| 872 | Economic Theory | 23 | 797 | 7 | 9 |
| 873 | auditory perception | 13 | 796 | 133 | 97 |
| 873 | Social policy | 34 | 796 | 153 | 156 |
| 875 | Vocational guidance | 49 | 795 | 133 | 298 |
| 876 | Multivariate Analysis | 32 | 790 | 54 | 94 |
| 877 | Globalization | 29 | 789 | 49 | 68 |
| 878 | Hydrodynamics | 8 | 788 | 332 | 143 |
| 879 | Socioeconomic Factors | 31 | 781 | 89 | 131 |
| 880 | Long-Term Care | 42 | 777 | 47 | 138 |
| 881 | dual diagnosis | 40 | 759 | 2 | 2 |
| 881 | Elections | 24 | 759 | 62 | 58 |
| 883 | bioclimatology | 19 | 757 | 183 | 137 |
| 884 | Sedimentary rocks | 7 | 755 | 358 | 126 |
| 885 | Long-term care facilities | 41 | 752 | 48 | 139 |
| 885 | Electrophoresis | 29 | 752 | 365 | 395 |
| 887 | Catalysts | 8 | 748 | 357 | 109 |
| 888 | Hallucinogens | 26 | 742 | 10 | 18 |
| 889 | Organ transplantation | 41 | 733 | 37 | 36 |
| 890 | Invertebrates | 13 | 731 | 185 | 97 |
| 891 | Engineering Mathematics | 18 | 728 | 656 | 373 |
| 892 | Religion | 89 | 727 | 43 | 33 |
| 892 | Small Business | 13 | 727 | 254 | 363 |
| 892 | forestry | 13 | 727 | 73 | 35 |
| 895 | Quantum electronics | 44 | 725 | 282 | 347 |
| 895 | Multiple Myeloma | 50 | 725 | 12 | 14 |
| 897 | industrial relations | 26 | 721 | 192 | 148 |
| 897 | primary prevention | 24 | 721 | 59 | 49 |
| 899 | Agricultural Science | 7 | 720 | 103 | 84 |
| 900 | innovation | 6 | 715 | 396 | 285 |
| 901 | Neuroendocrinology | 12 | 713 | 15 | 54 |
| 902 | Land use | 18 | 712 | 302 | 263 |
| 903 | Systems Analysis | 21 | 708 | 269 | 166 |
| 904 | Artificial Organs | 38 | 701 | 75 | 89 |
| 904 | Race | 2 | 701 | 87 | 2 |
| 906 | Plant Taxonomy | 12 | 700 | 138 | 73 |
| 907 | tomography | 36 | 691 | 28 | 42 |
| 908 | Strategic planning | 14 | 688 | 204 | 172 |
| 909 | Telemedicine | 26 | 684 | 29 | 52 |
| 909 | Entrepreneurship | 6 | 684 | 677 | 425 |
| 911 | mass transfer | 15 | 681 | 761 | 620 |
| 912 | cell adhesion molecules | 3 | 679 | 158 | 33 |
| 912 | transport vesicles | 7 | 679 | 81 | 211 |
| 914 | Climate | 18 | 672 | 104 | 123 |
| 915 | Contraception | 47 | 671 | 54 | 122 |
| 915 | Africa | 46 | 671 | 171 | 199 |
| 917 | Nonprofit organizations | 44 | 670 | 5 | 43 |
| 918 | Histocompatibility Testing | 17 | 669 | 100 | 65 |
| 919 | Religion and Psychology | 33 | 666 | 17 | 20 |
| 920 | Ultrasonics | 15 | 663 | 426 | 377 |
| 921 | Ultrasound | 12 | 662 | 294 | 177 |
| 922 | elder abuse | 26 | 659 | 23 | 40 |
| 922 | research and development | 9 | 659 | 92 | 70 |
| 924 | breastfeeding | 33 | 656 | 37 | 59 |
| 925 | death | 13 | 654 | 42 | 8 |
| 926 | urban forestry | 7 | 653 | 81 | 33 |
| 927 | Macroeconomics | 21 | 652 | 24 | 36 |
| 927 | Minerals | 17 | 652 | 152 | 117 |
| 929 | Immunopharmacology | 23 | 651 | 219 | 235 |
| 930 | European Union | 3 | 650 | 163 | 24 |
| 931 | Developmental Immunology | 11 | 646 | 201 | 139 |
| 932 | Yeast | 14 | 645 | 106 | 103 |
| 933 | Carbon | 15 | 642 | 502 | 617 |
| 934 | radiative transfer | 15 | 641 | 221 | 138 |
| 935 | Food Microbiology | 8 | 640 | 650 | 485 |
| 936 | Physical organic chemistry | 23 | 635 | 419 | 377 |
| 937 | Food preferences | 6 | 632 | 223 | 92 |
| 938 | Surface properties | 14 | 630 | 385 | 359 |
| 939 | Mortgages | 8 | 625 | 95 | 32 |
| 939 | Uncertainty | 5 | 625 | 107 | 36 |
| 941 | Venture Capital | 3 | 617 | 276 | 214 |
| 942 | DNA methylation | 12 | 614 | 59 | 60 |
| 943 | Particle Physics | 11 | 613 | 60 | 77 |
| 943 | Sun | 23 | 613 | 99 | 113 |
| 945 | Positive Psychology | 7 | 612 | 66 | 58 |
| 946 | Cardiac electrophysiology | 26 | 611 | 35 | 62 |
| 946 | arrhythmia | 26 | 611 | 35 | 62 |
| 948 | Remote Sensing | 12 | 604 | 658 | 276 |
| 948 | Elementary particles | 8 | 604 | 57 | 73 |
| 950 | Criminal Law | 27 | 601 | 22 | 45 |
| 950 | Communication in politics | 10 | 601 | 57 | 22 |
| 952 | Agronomy | 2 | 599 | 507 | 174 |
| 953 | Computer Science | 34 | 598 | 354 | 382 |
| 953 | Petroleum Engineering | 7 | 598 | 401 | 159 |
| 955 | Evolutionary Genetics | 11 | 595 | 165 | 93 |
| 955 | Molecular Epidemiology | 11 | 595 | 165 | 93 |
| 957 | Pregnancy | 27 | 592 | 130 | 176 |
| 958 | freshwater biology | 14 | 588 | 298 | 241 |
| 959 | Precision medicine | 21 | 584 | 32 | 30 |
| 960 | sports injuries | 46 | 583 | 22 | 52 |
| 961 | Fungi | 17 | 582 | 339 | 413 |
| 961 | data protection | 13 | 582 | 118 | 63 |
| 963 | Neurotoxicology | 9 | 576 | 228 | 136 |
| 964 | Ferroelectricity | 17 | 575 | 374 | 185 |
| 965 | Adipose tissue | 8 | 572 | 4 | 2 |
| 966 | molecular design | 24 | 571 | 24 | 56 |
| 967 | Teratology | 11 | 569 | 96 | 70 |
| 967 | Stress | 13 | 569 | 30 | 26 |
| 969 | Endocrine system | 95 | 567 | 22 | 37 |
| 970 | Theology | 150 | 566 | 13 | 6 |
| 970 | election law | 21 | 566 | 44 | 64 |
| 972 | Cheminformatics | 8 | 564 | 96 | 117 |
| 973 | Semiconductors | 40 | 562 | 418 | 530 |
| 974 | cell proliferation | 21 | 558 | 49 | 58 |
| 975 | Bioinorganic chemistry | 35 | 557 | 322 | 488 |
| 976 | Mechanics | 14 | 556 | 519 | 313 |
| 977 | Voting | 20 | 555 | 45 | 65 |
| 978 | Ceramics | 6 | 554 | 1030 | 392 |
| 979 | sadness | 12 | 552 | 28 | 9 |
| 979 | antisocial personality disorder | 12 | 552 | 28 | 9 |
| 981 | psychophysics | 21 | 549 | 55 | 50 |
| 982 | Pediatric Endocrinology | 27 | 548 | 16 | 10 |
| 983 | toxicity testing | 7 | 541 | 275 | 104 |
| 984 | traffic safety | 30 | 540 | 15 | 24 |
| 985 | Diplomatic relations | 43 | 539 | 80 | 47 |
| 986 | Obstetric Nursing | 27 | 533 | 35 | 47 |
| 987 | Catalyst | 1 | 532 | 71 | 19 |
| 988 | weight loss | 27 | 531 | 10 | 12 |
| 989 | Technology Assessment | 13 | 529 | 40 | 84 |
| 990 | Sociobiology | 25 | 528 | 29 | 58 |
| 990 | Peasants | 7 | 528 | 28 | 21 |
| 992 | Graph Theory | 21 | 526 | 183 | 102 |
| 993 | men | 17 | 525 | 28 | 22 |
| 993 | biological invasions | 17 | 525 | 130 | 175 |
| 995 | Hematopoietic stem cell transplantation | 14 | 523 | 90 | 122 |
| 996 | Herbal medicine | 8 | 522 | 333 | 214 |
| 997 | occupational health and safety | 13 | 521 | 43 | 21 |
| 998 | Sustainable agriculture | 5 | 520 | 485 | 179 |
| 999 | Parenteral nutrition | 23 | 518 | 247 | 379 |
| 1000 | pain management | 20 | 517 | 130 | 151 |