| 1 | Biology | 208 | 51.2K | 1073 | 467 |
| 2 | Science | 237 | 51.0K | 1050 | 471 |
| 3 | Hematology | 857 | 48.1K | 65 | 55 |
| 4 | Physics | 156 | 41.0K | 1547 | 625 |
| 5 | Natural history | 40 | 32.7K | 917 | 380 |
| 6 | Cytology | 97 | 27.2K | 721 | 250 |
| 7 | Medicine | 253 | 27.1K | 1039 | 525 |
| 8 | Cell Biology | 80 | 26.1K | 757 | 261 |
| 9 | Cancer | 269 | 25.8K | 226 | 109 |
| 10 | Genetics | 122 | 25.1K | 440 | 181 |
| 11 | Molecular Biology | 163 | 20.2K | 1140 | 587 |
| 12 | Virology | 29 | 17.9K | 998 | 250 |
| 13 | Human genetics | 67 | 17.7K | 400 | 313 |
| 14 | gene mapping | 85 | 15.6K | 169 | 45 |
| 15 | Oncology | 131 | 12.9K | 142 | 125 |
| 16 | Research | 228 | 12.7K | 859 | 596 |
| 17 | DNA polymerases | 35 | 11.5K | 55 | 23 |
| 18 | Medical Oncology | 235 | 11.2K | 57 | 63 |
| 19 | Biochemistry | 147 | 10.6K | 1563 | 995 |
| 20 | Radiobiology | 198 | 10.2K | 57 | 51 |
| 21 | Immunity | 25 | 10.1K | 624 | 227 |
| 22 | Allergy | 14 | 9.3K | 484 | 101 |
| 23 | Pathology | 97 | 9.1K | 263 | 127 |
| 24 | Biophysics | 313 | 9.0K | 450 | 489 |
| 25 | Chemistry | 84 | 8.0K | 2297 | 1361 |
| 26 | Medical genetics | 69 | 7.6K | 527 | 343 |
| 27 | genome | 59 | 7.4K | 196 | 153 |
| 28 | Surgery | 11 | 6.5K | 939 | 241 |
| 29 | Immunology | 141 | 6.2K | 486 | 554 |
| 30 | Medical Physics | 268 | 5.9K | 60 | 107 |
| 31 | Oncogenes | 51 | 5.4K | 189 | 134 |
| 32 | Genomics | 70 | 4.7K | 478 | 282 |
| 33 | Biotechnology | 29 | 4.6K | 2289 | 994 |
| 34 | Bioengineering | 20 | 4.6K | 1753 | 655 |
| 34 | Stem cells | 101 | 4.6K | 103 | 103 |
| 36 | Computational Biology | 65 | 4.5K | 382 | 297 |
| 37 | Leukemia | 72 | 4.1K | 108 | 139 |
| 38 | Chromosome mapping | 50 | 4.1K | 260 | 143 |
| 39 | Biochemical Engineering | 11 | 3.6K | 1786 | 683 |
| 40 | Microbiology | 38 | 3.6K | 2104 | 1358 |
| 41 | Public Health | 71 | 3.5K | 960 | 721 |
| 42 | Bioinformatics | 58 | 3.5K | 314 | 274 |
| 43 | Genetic regulation | 30 | 3.0K | 219 | 182 |
| 44 | Cell differentiation | 44 | 3.0K | 369 | 380 |
| 45 | Pharmaceutical Chemistry | 33 | 2.7K | 1244 | 681 |
| 46 | Diagnostic Imaging | 49 | 2.4K | 340 | 229 |
| 47 | Epidemiology | 43 | 2.3K | 862 | 590 |
| 48 | Biomedical Engineering | 55 | 2.3K | 1130 | 926 |
| 49 | Medical Laboratory Science | 48 | 2.3K | 360 | 366 |
| 50 | Cytogenetics | 20 | 2.3K | 496 | 333 |
| 51 | Genetic engineering | 31 | 2.1K | 503 | 360 |
| 52 | Immunotherapy | 22 | 2.0K | 575 | 383 |
| 53 | Pharmacology | 28 | 2.0K | 1977 | 1244 |
| 54 | Therapeutics | 21 | 2.0K | 533 | 314 |
| 55 | Psychology | 36 | 1.9K | 1361 | 954 |
| 56 | Quality of life | 15 | 1.9K | 506 | 176 |
| 57 | Flow cytometry | 37 | 1.8K | 17 | 13 |
| 58 | nucleic acids | 23 | 1.8K | 614 | 575 |
| 59 | Urology | 36 | 1.8K | 420 | 327 |
| 60 | Physiology | 10 | 1.8K | 2475 | 992 |
| 61 | rehabilitation | 13 | 1.7K | 992 | 353 |
| 62 | cloning | 24 | 1.6K | 109 | 137 |
| 63 | Brachytherapy | 60 | 1.5K | 3 | 8 |
| 64 | Membranes | 16 | 1.5K | 743 | 454 |
| 65 | Gene expression regulation | 7 | 1.5K | 585 | 229 |
| 66 | Pharmacy | 12 | 1.4K | 1020 | 355 |
| 67 | Clinical Chemistry | 15 | 1.4K | 1353 | 745 |
| 68 | Developmental Genetics | 4 | 1.3K | 439 | 234 |
| 68 | viral genetics | 4 | 1.3K | 270 | 182 |
| 70 | drugs | 7 | 1.3K | 1474 | 357 |
| 71 | cell physiology | 11 | 1.1K | 765 | 536 |
| 72 | Neurology | 11 | 1.0K | 2919 | 1923 |
| 73 | Optics | 53 | 995 | 1339 | 1142 |
| 74 | Medical innovations | 9 | 983 | 487 | 446 |
| 75 | Pharmaceutical Technology | 1 | 977 | 2393 | 337 |
| 75 | Pharmacokinetics | 1 | 977 | 1692 | 148 |
| 77 | Signal Transduction | 2 | 954 | 1726 | 474 |
| 78 | Environmental Health | 26 | 952 | 1883 | 1918 |
| 79 | Developmental Biology | 16 | 940 | 820 | 789 |
| 80 | Health | 35 | 910 | 457 | 501 |
| 81 | Antioxidants | 1 | 899 | 1265 | 249 |
| 81 | Oxidation-reduction | 1 | 899 | 1263 | 321 |
| 83 | Genetic therapy | 15 | 891 | 449 | 326 |
| 84 | histological techniques | 6 | 882 | 464 | 165 |
| 85 | Nuclear Medicine | 22 | 806 | 302 | 285 |
| 86 | Liver diseases | 8 | 805 | 907 | 706 |
| 87 | Metastasis | 8 | 789 | 45 | 60 |
| 88 | drug development | 7 | 788 | 621 | 498 |
| 89 | proteins | 15 | 777 | 950 | 656 |
| 90 | Proteome | 12 | 769 | 551 | 426 |
| 91 | Obstetrics | 23 | 743 | 738 | 673 |
| 92 | gene therapy | 11 | 727 | 523 | 406 |
| 93 | Radioisotopes | 18 | 676 | 369 | 155 |
| 94 | Hormones | 10 | 654 | 692 | 476 |
| 95 | Spectrum analysis | 12 | 637 | 2322 | 1633 |
| 96 | Photochemistry | 20 | 632 | 537 | 508 |
| 97 | Aging | 7 | 627 | 1917 | 1019 |
| 98 | Steroids | 8 | 615 | 565 | 277 |
| 99 | Sociology | 9 | 613 | 1752 | 914 |
| 100 | Psychiatry | 3 | 611 | 4187 | 1833 |
| 101 | Chromosomes | 8 | 586 | 571 | 351 |
| 102 | Medical Anthropology | 8 | 582 | 688 | 529 |
| 103 | mutation | 6 | 579 | 399 | 210 |
| 104 | drug therapy | 12 | 571 | 1130 | 907 |
| 105 | Endocrinology | 11 | 569 | 1659 | 1495 |
| 106 | Nanotechnology | 8 | 562 | 3229 | 2384 |
| 107 | Medical Technology | 5 | 561 | 1427 | 482 |
| 108 | biobanks | 23 | 558 | 9 | 8 |
| 109 | Immune system | 6 | 554 | 704 | 718 |
| 110 | Recombinant DNA | 7 | 545 | 1061 | 521 |
| 111 | Transplantation | 6 | 541 | 777 | 568 |
| 112 | Carcinogenesis | 17 | 537 | 308 | 417 |
| 112 | Visual Perception | 16 | 537 | 634 | 631 |
| 112 | Memory | 16 | 537 | 709 | 751 |
| 112 | Attention | 16 | 537 | 668 | 656 |
| 112 | Perception | 16 | 537 | 739 | 738 |
| 117 | Molecular cloning | 6 | 535 | 1074 | 497 |
| 117 | Genetic recombination | 6 | 535 | 1059 | 488 |
| 119 | government | 22 | 532 | 149 | 162 |
| 120 | Psychopharmacology | 1 | 527 | 2238 | 756 |
| 120 | Psychophysiology | 1 | 527 | 3669 | 1323 |
| 122 | Neurons | 1 | 522 | 917 | 680 |
| 123 | Critical Care | 7 | 516 | 1030 | 896 |
| 123 | Critical Care Medicine | 7 | 516 | 953 | 886 |
| 125 | Geriatric Oncology | 9 | 504 | 244 | 178 |
| 126 | Plant cells | 3 | 497 | 1050 | 833 |
| 127 | Botany | 4 | 478 | 3300 | 1938 |
| 128 | Radiation Oncology | 17 | 465 | 66 | 79 |
| 129 | Drug delivery systems | 10 | 455 | 769 | 753 |
| 130 | Pharmacogenetics | 8 | 445 | 560 | 415 |
| 131 | viruses | 5 | 434 | 1172 | 882 |
| 132 | Image Processing | 8 | 431 | 1441 | 1050 |
| 133 | preventive medicine | 5 | 422 | 932 | 571 |
| 134 | Computer Vision | 7 | 405 | 714 | 589 |
| 135 | Diet | 8 | 398 | 1273 | 1228 |
| 136 | Dermatology | 11 | 396 | 914 | 760 |
| 136 | Health Education | 17 | 396 | 669 | 651 |
| 138 | Medical Microbiology | 3 | 395 | 2244 | 1404 |
| 139 | Photonics | 7 | 376 | 1358 | 1101 |
| 140 | environmental exposure | 12 | 372 | 818 | 924 |
| 141 | Biometrics | 9 | 371 | 608 | 447 |
| 142 | Familial diseases | 7 | 351 | 93 | 49 |
| 143 | occupational diseases | 9 | 350 | 412 | 394 |
| 144 | Occupational Health | 11 | 347 | 440 | 334 |
| 145 | Ecology | 5 | 346 | 5010 | 4187 |
| 146 | Photobiology | 9 | 344 | 752 | 580 |
| 147 | Chemotherapy | 8 | 341 | 793 | 670 |
| 148 | Environmental Microbiology | 1 | 334 | 2234 | 905 |
| 148 | soil microbiology | 1 | 334 | 2233 | 1080 |
| 148 | Microorganisms | 1 | 334 | 1691 | 717 |
| 151 | plant molecular biology | 4 | 331 | 1265 | 1084 |
| 152 | Molecular ecology | 3 | 326 | 1075 | 787 |
| 153 | Plants | 3 | 322 | 2133 | 1239 |
| 154 | Analytical Chemistry | 6 | 319 | 3345 | 2519 |
| 155 | Clinical Biochemistry | 5 | 317 | 930 | 573 |
| 156 | Palliative Care | 12 | 314 | 350 | 315 |
| 157 | Environment | 4 | 303 | 4371 | 3912 |
| 158 | Biosensors | 2 | 302 | 1567 | 997 |
| 158 | Bioelectronics | 2 | 302 | 1366 | 908 |
| 158 | chromatin | 4 | 302 | 77 | 72 |
| 161 | Health Services Administration | 12 | 300 | 381 | 429 |
| 162 | Light | 11 | 288 | 448 | 777 |
| 163 | DNA | 3 | 287 | 632 | 193 |
| 164 | Primary health care | 10 | 285 | 843 | 741 |
| 164 | Bioorganic chemistry | 17 | 285 | 1293 | 1760 |
| 166 | Organic Chemistry | 16 | 283 | 1611 | 1836 |
| 167 | Mobile genetic elements | 2 | 277 | 137 | 18 |
| 168 | health behavior | 7 | 263 | 568 | 478 |
| 169 | Recycling | 1 | 259 | 1025 | 546 |
| 170 | Chronic diseases | 4 | 257 | 534 | 467 |
| 171 | behavioral medicine | 4 | 246 | 1081 | 912 |
| 172 | Dietetics | 4 | 243 | 507 | 277 |
| 173 | Plant physiology | 2 | 242 | 2309 | 1550 |
| 174 | Metabolism | 6 | 237 | 1958 | 2114 |
| 175 | carcinogens | 8 | 235 | 540 | 718 |
| 175 | health services | 5 | 235 | 783 | 499 |
| 177 | Europe | 10 | 234 | 1768 | 1590 |
| 178 | plant communities | 1 | 233 | 1601 | 874 |
| 179 | Metabolic diseases | 5 | 232 | 1772 | 1869 |
| 180 | Clinical Pharmacology | 3 | 231 | 1490 | 833 |
| 180 | Cardiovascular system | 5 | 231 | 1185 | 1471 |
| 182 | Molecular Genetics | 3 | 227 | 1800 | 1422 |
| 183 | Lymphoma | 11 | 223 | 129 | 106 |
| 184 | drug resistance | 1 | 221 | 1371 | 433 |
| 185 | Population Genetics | 2 | 220 | 1439 | 932 |
| 186 | rare diseases | 2 | 216 | 825 | 407 |
| 187 | biochemical markers | 2 | 215 | 1129 | 349 |
| 188 | Patient education | 10 | 213 | 263 | 388 |
| 188 | counseling | 10 | 213 | 641 | 679 |
| 190 | Immunohistochemistry | 3 | 212 | 177 | 43 |
| 191 | Semantics | 1 | 210 | 464 | 87 |
| 192 | Biomarkers | 1 | 201 | 898 | 133 |
| 193 | Health Policy | 7 | 200 | 1459 | 1405 |
| 194 | Health Services Research | 9 | 196 | 891 | 985 |
| 194 | Microcirculation | 4 | 196 | 374 | 268 |
| 196 | Bacteriology | 4 | 195 | 1657 | 1603 |
| 197 | Public Policy | 3 | 193 | 1754 | 1128 |
| 197 | Social support | 6 | 193 | 84 | 78 |
| 197 | Social environment | 6 | 193 | 104 | 87 |
| 200 | Antibodies | 6 | 192 | 441 | 454 |
| 200 | Antigens | 6 | 192 | 610 | 592 |
| 202 | Molecular Pharmacology | 7 | 191 | 477 | 657 |
| 203 | Environmental Toxicology | 4 | 190 | 2196 | 1992 |
| 204 | Statistics | 11 | 187 | 1475 | 1429 |
| 205 | Research Design | 7 | 186 | 712 | 795 |
| 206 | Systems Biology | 5 | 176 | 1224 | 1100 |
| 206 | Molecular Imaging | 7 | 176 | 415 | 568 |
| 208 | Respiration | 3 | 175 | 1456 | 1114 |
| 209 | Anatomy | 5 | 173 | 1505 | 1373 |
| 209 | Embryology | 5 | 173 | 1181 | 1349 |
| 211 | Geriatrics | 4 | 171 | 2590 | 1928 |
| 212 | Nursing | 3 | 170 | 1862 | 918 |
| 213 | Psychoneuroimmunology | 1 | 164 | 999 | 655 |
| 213 | Neuroimmunology | 1 | 164 | 1093 | 704 |
| 215 | Technology | 5 | 162 | 3429 | 2845 |
| 216 | visualization | 9 | 159 | 857 | 621 |
| 217 | Histochemistry | 3 | 157 | 1085 | 712 |
| 217 | pain | 10 | 157 | 696 | 1105 |
| 219 | United Kingdom | 4 | 156 | 1368 | 1313 |
| 220 | Physical fitness | 4 | 155 | 929 | 754 |
| 221 | Liposomes | 6 | 154 | 318 | 405 |
| 222 | Reproduction | 5 | 153 | 1812 | 1709 |
| 223 | men | 5 | 151 | 152 | 147 |
| 224 | Host-parasite interactions | 2 | 149 | 1453 | 1436 |
| 224 | Virulence | 2 | 149 | 1321 | 1336 |
| 226 | Nanostructured Materials | 1 | 145 | 4038 | 2478 |
| 226 | Nanoparticles | 1 | 145 | 2689 | 1542 |
| 228 | biological evolution | 3 | 143 | 2034 | 1966 |
| 228 | Vaccines | 6 | 143 | 1349 | 1556 |
| 230 | Teratology | 3 | 134 | 259 | 242 |
| 230 | abnormalities | 3 | 134 | 159 | 156 |
| 230 | United States | 5 | 134 | 4359 | 3709 |
| 233 | Histology | 3 | 133 | 1887 | 1670 |
| 233 | Electronics | 5 | 133 | 3014 | 2564 |
| 235 | Toxicology | 6 | 131 | 3621 | 4179 |
| 236 | Health promotion | 5 | 129 | 1073 | 1112 |
| 237 | Photography | 41 | 128 | 620 | 609 |
| 238 | Multiple Myeloma | 9 | 126 | 154 | 161 |
| 239 | Proteomics | 6 | 125 | 791 | 1170 |
| 240 | Radiography | 2 | 124 | 980 | 900 |
| 241 | mutagens | 7 | 123 | 512 | 923 |
| 242 | Social Sciences | 2 | 120 | 4433 | 2157 |
| 242 | ethnicity | 2 | 120 | 906 | 363 |
| 242 | health and race | 2 | 120 | 294 | 164 |
| 242 | ethnic groups | 2 | 120 | 430 | 222 |
| 246 | Decision making | 2 | 119 | 1884 | 1145 |
| 247 | medical education | 3 | 118 | 1758 | 1258 |
| 248 | Genetic Counseling | 4 | 116 | 215 | 175 |
| 248 | Enzyme inhibitors | 2 | 116 | 525 | 295 |
| 250 | Hematopoietic stem cell transplantation | 7 | 114 | 214 | 509 |
| 251 | Engineering | 4 | 113 | 4175 | 3312 |
| 251 | Blood vessels | 3 | 113 | 359 | 312 |
| 253 | Molecular evolution | 2 | 112 | 1888 | 1607 |
| 253 | Nervous system | 3 | 112 | 2374 | 2420 |
| 255 | Hematopoiesis | 5 | 110 | 24 | 39 |
| 256 | Nutrition | 6 | 106 | 3187 | 4130 |
| 256 | health planning | 3 | 106 | 2238 | 1694 |
| 258 | Child | 3 | 104 | 2397 | 1964 |
| 259 | Molecular Microbiology | 1 | 103 | 1358 | 1108 |
| 259 | Radiopharmaceuticals | 5 | 103 | 273 | 149 |
| 261 | Neurophysiology | 2 | 102 | 3123 | 2762 |
| 261 | Immunopharmacology | 3 | 102 | 1115 | 1030 |
| 261 | cytokines | 3 | 102 | 1425 | 1504 |
| 264 | Dentistry | 4 | 99 | 641 | 445 |
| 264 | drug control | 1 | 99 | 641 | 360 |
| 266 | Diabetes mellitus | 2 | 93 | 2392 | 2308 |
| 266 | Gerontology | 3 | 93 | 1971 | 1498 |
| 266 | cell interaction | 3 | 93 | 1249 | 1359 |
| 266 | Diabetes | 2 | 93 | 2533 | 2398 |
| 270 | Sexual health | 2 | 90 | 933 | 614 |
| 270 | Behavior | 1 | 90 | 4567 | 3429 |
| 272 | protein | 6 | 89 | 905 | 1216 |
| 272 | Cell death | 2 | 89 | 1441 | 1591 |
| 274 | Pharmacogenomics | 2 | 88 | 407 | 367 |
| 274 | industrial hygiene | 7 | 88 | 640 | 691 |
| 274 | Environmental pollutants | 4 | 88 | 2041 | 2520 |
| 277 | Clinical Psychology | 2 | 86 | 1603 | 1568 |
| 278 | Brain | 1 | 85 | 3597 | 2649 |
| 279 | Chemical analysis | 2 | 84 | 1468 | 1230 |
| 280 | Ophthalmology | 1 | 83 | 2523 | 1767 |
| 280 | Andrology | 5 | 83 | 492 | 660 |
| 280 | Alternative Medicine | 7 | 83 | 1219 | 1903 |
| 280 | complementary therapies | 7 | 83 | 1319 | 1963 |
| 280 | rural health | 2 | 83 | 207 | 170 |
| 285 | Chronobiology | 1 | 82 | 937 | 459 |
| 285 | Biopharmaceutics | 3 | 82 | 1238 | 1313 |
| 285 | Circadian rhythms | 1 | 82 | 698 | 413 |
| 285 | biological clocks | 1 | 82 | 937 | 459 |
| 285 | circadian rhythm | 1 | 82 | 937 | 459 |
| 285 | biological rhythms | 1 | 82 | 888 | 452 |
| 285 | Culture techniques | 2 | 82 | 387 | 274 |
| 292 | Analytical Biochemistry | 1 | 80 | 2775 | 1822 |
| 292 | Immunochemistry | 2 | 80 | 1280 | 1010 |
| 292 | enzymes | 3 | 80 | 1526 | 1695 |
| 295 | Production Management | 1 | 79 | 1649 | 1361 |
| 295 | Microscopy | 3 | 79 | 1677 | 1269 |
| 297 | Combinatorial chemistry | 1 | 78 | 1548 | 1100 |
| 297 | Gene expression | 1 | 78 | 528 | 341 |
| 297 | Women's health | 4 | 78 | 1070 | 1237 |
| 297 | miniaturization | 1 | 78 | 2709 | 2167 |
| 301 | Pediatric Neurology | 1 | 77 | 1482 | 1483 |
| 301 | Electrochemistry | 4 | 77 | 3164 | 3187 |
| 301 | mammals | 1 | 77 | 1612 | 956 |
| 301 | drug evaluation | 6 | 77 | 962 | 1439 |
| 305 | Mathematics | 3 | 75 | 5428 | 4128 |
| 306 | health workforce | 1 | 71 | 370 | 296 |
| 306 | Immunogenetics | 3 | 71 | 717 | 791 |
| 308 | Drug discovery | 2 | 68 | 337 | 320 |
| 309 | Genetic epidemiology | 3 | 67 | 269 | 328 |
| 309 | heredity | 3 | 67 | 675 | 712 |
| 311 | Computer Graphics | 2 | 64 | 2042 | 1745 |
| 312 | Evolution | 3 | 63 | 1848 | 2200 |
| 313 | Radiology | 7 | 62 | 979 | 1358 |
| 313 | Thrombosis | 5 | 62 | 795 | 1262 |
| 315 | Neurochemistry | 1 | 60 | 3231 | 2771 |
| 315 | Mycology | 1 | 60 | 2419 | 1804 |
| 315 | Fungi | 1 | 60 | 1585 | 1303 |
| 315 | Developing countries | 1 | 60 | 3790 | 2553 |
| 319 | Growth | 2 | 59 | 1339 | 1661 |
| 320 | hospice care | 2 | 58 | 687 | 565 |
| 320 | Bioethics | 1 | 58 | 1509 | 823 |
| 320 | Medical Ethics | 1 | 58 | 1927 | 1026 |
| 320 | nursing ethics | 1 | 58 | 471 | 322 |
| 324 | Organizational Behavior | 1 | 57 | 898 | 789 |
| 324 | Organizational culture | 1 | 57 | 92 | 95 |
| 324 | X-rays | 7 | 57 | 328 | 581 |
| 324 | corporate culture | 1 | 57 | 371 | 269 |
| 328 | Rheumatology | 1 | 56 | 1784 | 1451 |
| 328 | Pediatric Rheumatology | 1 | 56 | 410 | 245 |
| 330 | Food Microbiology | 2 | 55 | 1501 | 1899 |
| 331 | Prisons | 2 | 54 | 389 | 265 |
| 332 | older people | 1 | 51 | 2589 | 1457 |
| 333 | Clinical Trials | 4 | 48 | 439 | 673 |
| 333 | Pediatric Hematology | 2 | 48 | 488 | 327 |
| 333 | Drug design | 1 | 48 | 2885 | 2349 |
| 333 | Lipids | 2 | 48 | 1624 | 1976 |
| 337 | Sports Medicine | 8 | 47 | 1521 | 2497 |
| 337 | Telemedicine | 2 | 47 | 492 | 629 |
| 337 | Sports | 8 | 47 | 1231 | 1968 |
| 340 | Radiation | 5 | 46 | 1732 | 2387 |
| 341 | Nanobiotechnology | 1 | 44 | 815 | 976 |
| 341 | Bioinorganic chemistry | 2 | 44 | 1655 | 1782 |
| 343 | Catalysis | 1 | 43 | 4176 | 3852 |
| 344 | Histocompatibility Testing | 2 | 42 | 599 | 748 |
| 344 | nanoscience | 1 | 42 | 3984 | 3605 |
| 346 | Neuropsychiatry | 1 | 41 | 1372 | 1273 |
| 347 | Student Health Services | 1 | 40 | 468 | 392 |
| 348 | Respiratory system | 2 | 39 | 734 | 1024 |
| 349 | Electrophoresis | 2 | 38 | 2009 | 2299 |
| 349 | Cell communication | 2 | 38 | 1089 | 1441 |
| 351 | Information Systems | 1 | 35 | 2465 | 2107 |
| 351 | General Surgery | 1 | 35 | 1026 | 709 |
| 351 | Quality Assurance | 1 | 35 | 735 | 497 |
| 351 | System analysis | 1 | 35 | 3707 | 3059 |
| 351 | North America | 1 | 35 | 1448 | 1075 |
| 351 | Safety management | 1 | 35 | 1180 | 765 |
| 357 | Oxidative stress | 1 | 33 | 1943 | 2204 |
| 357 | Cell survival | 1 | 33 | 467 | 505 |
| 357 | tomography | 2 | 33 | 507 | 499 |
| 357 | molecular chaperones | 1 | 33 | 516 | 507 |
| 361 | pain management | 6 | 32 | 418 | 963 |
| 361 | Substance Abuse | 1 | 32 | 2166 | 1954 |
| 361 | pollutants | 2 | 32 | 2299 | 3078 |
| 361 | environmental pollution | 2 | 32 | 4813 | 6069 |
| 361 | software | 1 | 32 | 1763 | 1809 |
| 361 | Pollution | 2 | 32 | 5763 | 7146 |
| 367 | Raman spectroscopy | 2 | 31 | 1015 | 1270 |
| 368 | DNA methylation | 1 | 29 | 553 | 703 |
| 369 | chronic disease | 2 | 28 | 390 | 596 |
| 369 | arthritis | 1 | 28 | 1799 | 2123 |
| 371 | nuclear magnetic resonance | 1 | 27 | 1524 | 1332 |
| 371 | Magnetic Resonance Spectroscopy | 1 | 27 | 1719 | 1512 |
| 371 | Statistical models | 2 | 27 | 147 | 168 |
| 374 | Data Mining | 3 | 26 | 1669 | 2822 |
| 374 | Signal Processing | 1 | 26 | 3531 | 3472 |
| 374 | Functional Genomics | 2 | 26 | 348 | 703 |
| 374 | Thorax | 1 | 26 | 735 | 901 |
| 378 | Otolaryngology | 1 | 25 | 899 | 818 |
| 378 | Agricultural Chemistry | 1 | 25 | 3397 | 3476 |
| 378 | Public opinion | 1 | 25 | 716 | 753 |
| 381 | Environmental monitoring | 3 | 23 | 3786 | 5878 |
| 381 | Chromatography | 1 | 23 | 2595 | 2619 |
| 381 | Detectors | 1 | 23 | 2628 | 2513 |
| 381 | Chromatographic analysis | 1 | 23 | 2947 | 2823 |
| 385 | Occupational exposure | 3 | 22 | 71 | 116 |
| 385 | vascular diseases | 2 | 22 | 834 | 1352 |
| 387 | Marine Biology | 1 | 21 | 3518 | 3781 |
| 387 | Polymers | 1 | 21 | 5557 | 5508 |
| 387 | Marine Biotechnology | 1 | 21 | 443 | 615 |
| 387 | Fluorescence spectroscopy | 1 | 21 | 489 | 556 |
| 387 | Molecular Spectroscopy | 1 | 21 | 2585 | 2740 |
| 392 | Nuclear Engineering | 1 | 20 | 2426 | 2136 |
| 392 | Pediatrics | 2 | 20 | 2837 | 4053 |
| 392 | Nuclear Chemistry | 1 | 20 | 1742 | 1483 |
| 392 | Radiochemistry | 1 | 20 | 1690 | 1384 |
| 392 | Hemostasis | 2 | 20 | 876 | 1284 |
| 392 | Evidence-Based Medicine | 1 | 20 | 2321 | 2364 |
| 398 | Mathematical Physics | 1 | 19 | 3802 | 3242 |
| 398 | Cognitive Therapy | 1 | 19 | 1038 | 1133 |
| 398 | Androgens | 2 | 19 | 308 | 587 |
| 398 | Statistical physics | 1 | 19 | 4469 | 4322 |
| 398 | Genes | 2 | 19 | 1469 | 2142 |
| 403 | food technology | 1 | 18 | 3637 | 4112 |
| 403 | Schizophrenia | 1 | 18 | 1503 | 1788 |
| 403 | Food | 1 | 18 | 4528 | 5144 |
| 406 | Drug targeting | 2 | 16 | 416 | 961 |
| 406 | Plant breeding | 1 | 16 | 1421 | 1582 |
| 406 | Condensed Matter | 1 | 16 | 4097 | 4044 |
| 406 | eugenics | 1 | 16 | 1028 | 1252 |
| 406 | Breeding | 1 | 16 | 1852 | 2105 |
| 406 | Pancreatic diseases | 1 | 16 | 614 | 720 |
| 412 | Music Therapy | 1 | 15 | 418 | 447 |
| 412 | Art Therapy | 1 | 15 | 368 | 412 |
| 412 | Infections | 1 | 15 | 1869 | 2513 |
| 412 | cosmic rays | 1 | 15 | 812 | 870 |
| 412 | Biocompatible Materials | 1 | 15 | 4848 | 5707 |
| 412 | Bacterial infections | 1 | 15 | 1494 | 2095 |
| 412 | Molecular structure | 1 | 15 | 3501 | 3769 |
| 419 | Cybernetics | 1 | 14 | 2460 | 2762 |
| 419 | Ergonomics | 1 | 14 | 1624 | 1700 |
| 419 | Plant Genetics | 2 | 14 | 813 | 1470 |
| 419 | Hypertension | 2 | 14 | 1800 | 2986 |
| 419 | Sleep Disorders | 1 | 14 | 2432 | 2695 |
| 419 | Diagnosis | 1 | 14 | 1229 | 1442 |
| 419 | Genetic disorders | 2 | 14 | 588 | 1010 |
| 419 | Animal genetics | 1 | 14 | 966 | 1192 |
| 419 | Spectroscopy | 1 | 14 | 446 | 308 |
| 419 | disease susceptibility | 1 | 14 | 760 | 1022 |
| 419 | scientific societies | 2 | 14 | 966 | 1634 |
| 419 | symptoms | 1 | 14 | 760 | 1022 |
| 419 | Digestive system diseases | 1 | 14 | 1493 | 1854 |
| 432 | Community Psychology | 1 | 13 | 904 | 1128 |
| 432 | Social Psychology | 1 | 13 | 3103 | 3548 |
| 432 | Tropical Medicine | 2 | 13 | 2288 | 3440 |
| 435 | Systems Analysis | 1 | 12 | 1843 | 2180 |
| 435 | Social welfare | 1 | 12 | 1047 | 1197 |
| 435 | Social work | 1 | 12 | 2346 | 2394 |
| 438 | Neurobiology | 1 | 11 | 2477 | 3301 |
| 438 | Chemical Ecology | 1 | 11 | 861 | 1247 |
| 438 | Environmental Chemistry | 1 | 11 | 3371 | 4115 |
| 438 | Mental Disorders | 1 | 11 | 4541 | 5428 |
| 438 | particle accelerators | 1 | 11 | 252 | 307 |
| 438 | Biological Systems | 1 | 11 | 1457 | 1713 |
| 438 | Lipid metabolism | 1 | 11 | 746 | 1127 |
| 438 | Electrophysiology | 1 | 11 | 1670 | 1948 |
| 438 | Lipid | 1 | 11 | 748 | 1130 |
| 438 | pheromones | 1 | 11 | 801 | 1193 |
| 438 | primary prevention | 1 | 11 | 756 | 1141 |
| 438 | Mental illness | 1 | 11 | 3038 | 3869 |
| 450 | Microfabrication | 1 | 10 | 777 | 991 |
| 450 | Obesity | 1 | 10 | 3026 | 4121 |
| 450 | DNS | 1 | 10 | 992 | 1400 |
| 450 | Australia | 1 | 10 | 3173 | 3628 |
| 454 | Economics | 1 | 9 | 5430 | 5437 |
| 454 | Environmental Engineering | 1 | 9 | 5526 | 6627 |
| 454 | Environmental Policy | 1 | 9 | 4842 | 6216 |
| 454 | Environmental Law | 1 | 9 | 1807 | 2558 |
| 454 | Immunopathology | 1 | 9 | 1953 | 2693 |
| 454 | Radiation Protection | 2 | 9 | 892 | 1173 |
| 454 | Data Science | 7 | 9 | 90 | 140 |
| 454 | radiation monitoring | 2 | 9 | 813 | 1093 |
| 454 | environmental protection | 1 | 9 | 5107 | 6357 |
| 454 | Plant genetic engineering | 1 | 9 | 1498 | 1942 |
| 454 | free radicals | 1 | 9 | 2028 | 2905 |
| 454 | Population | 7 | 9 | 612 | 2164 |
| 454 | Radiation dosimetry | 2 | 9 | 657 | 911 |
| 454 | Gastrointestinal diseases | 1 | 9 | 1307 | 1714 |
| 468 | Materials Science | 1 | 8 | 6051 | 6615 |
| 468 | occupational health and safety | 1 | 8 | 392 | 529 |
| 468 | Computer-Aided Design | 1 | 8 | 2020 | 2492 |
| 468 | Technological Innovations | 1 | 8 | 1835 | 2376 |
| 468 | biomedicine | 1 | 8 | 1750 | 2425 |
| 468 | bees | 1 | 8 | 673 | 907 |
| 474 | Surface Chemistry | 1 | 7 | 4769 | 5885 |
| 474 | Environmental Management | 1 | 7 | 4220 | 5629 |
| 474 | environmental indicators | 1 | 7 | 1747 | 2662 |
| 474 | Colloids | 1 | 7 | 4638 | 5927 |
| 474 | biological factors | 1 | 7 | 3039 | 3960 |
| 474 | Agriculture | 1 | 7 | 3636 | 4333 |
| 480 | probabilities | 2 | 6 | 1481 | 1927 |
| 481 | Endocrine glands | 1 | 5 | 463 | 827 |
| 481 | Integrative Medicine | 1 | 5 | 576 | 858 |
| 481 | Holistic Health | 1 | 5 | 941 | 1378 |
| 481 | Hemophilia | 1 | 5 | 705 | 989 |
| 481 | Osteoporosis | 1 | 5 | 691 | 1161 |
| 481 | Bone diseases | 1 | 5 | 867 | 1344 |
| 487 | Clinical Immunology | 1 | 4 | 1974 | 2927 |
| 487 | Queuing Theory | 1 | 4 | 285 | 394 |
| 487 | Developmental Immunology | 1 | 4 | 1380 | 2103 |
| 487 | actuators | 1 | 4 | 3057 | 4175 |
| 487 | transducers | 1 | 4 | 3057 | 4175 |
| 492 | natural products | 1 | 3 | 2733 | 3572 |
| 492 | Phytotherapy | 1 | 3 | 1567 | 2527 |
| 492 | Cannabis | 1 | 3 | 209 | 435 |
| 492 | biological agents | 1 | 3 | 1234 | 1530 |
| 496 | Mental Health | 1 | 2 | 2708 | 4045 |
| 496 | Physical organic chemistry | 1 | 2 | 2026 | 2822 |
| 496 | Radiotherapy | 3 | 2 | 343 | 571 |
| 496 | Genetic testing | 1 | 2 | 719 | 1287 |
| 496 | Ethnology | 1 | 2 | 2383 | 3034 |
| 501 | Meteorology | 1 | 1 | 3234 | 4751 |
| 501 | Cell division | 1 | 1 | 1053 | 1820 |
| 503 | Genetic Toxicology | 1 | 0 | 892 | 1548 |
| 503 | History of Medicine | 1 | 0 | 813 | 1055 |
