| 1 | Environmental Health | 18 | 527 | 2818 | 3207 |
| 2 | Artificial Intelligence | 13 | 485 | 2248 | 1746 |
| 3 | management | 22 | 451 | 1420 | 1748 |
| 4 | Chemistry | 28 | 411 | 4917 | 6752 |
| 5 | Pollution | 14 | 407 | 3342 | 3935 |
| 6 | Ecology | 12 | 303 | 4333 | 5375 |
| 7 | environmental protection | 15 | 279 | 1842 | 2639 |
| 8 | Biochemistry | 15 | 263 | 5753 | 6794 |
| 9 | Business | 15 | 247 | 1061 | 1580 |
| 10 | Science | 47 | 236 | 4008 | 10145 |
| 11 | Research | 40 | 219 | 3581 | 7971 |
| 12 | Sustainable Development | 8 | 207 | 1434 | 1695 |
| 12 | Molecular Biology | 13 | 207 | 5426 | 7346 |
| 14 | Cognitive Science | 1 | 206 | 2896 | 1205 |
| 15 | Manufacturing Processes | 4 | 192 | 2428 | 1699 |
| 16 | Microbiology | 15 | 191 | 4160 | 6368 |
| 17 | Environmental monitoring | 8 | 189 | 3023 | 3771 |
| 18 | Physics | 18 | 184 | 5880 | 9503 |
| 19 | Environment | 7 | 183 | 4256 | 5870 |
| 20 | Biotechnology | 19 | 182 | 3274 | 5819 |
| 21 | Environmental Toxicology | 5 | 180 | 2321 | 2453 |
| 22 | Environmental pollutants | 4 | 174 | 2404 | 2144 |
| 23 | Environmental Policy | 7 | 173 | 2569 | 3418 |
| 24 | Nanotechnology | 5 | 171 | 4735 | 4572 |
| 24 | Toxicology | 4 | 171 | 5070 | 4487 |
| 26 | Technology | 8 | 169 | 3366 | 3327 |
| 27 | Chemical Engineering | 15 | 166 | 2744 | 4090 |
| 28 | pollutants | 3 | 164 | 2305 | 1930 |
| 28 | environmental exposure | 3 | 164 | 2366 | 1802 |
| 30 | Production Engineering | 3 | 161 | 2349 | 1340 |
| 31 | Medicine | 33 | 155 | 4928 | 10889 |
| 32 | environmental pollution | 6 | 152 | 3930 | 4599 |
| 33 | Environmental Management | 7 | 150 | 2332 | 3257 |
| 34 | Materials | 11 | 143 | 4194 | 5207 |
| 35 | Biophysics | 6 | 136 | 5272 | 5542 |
| 36 | micromechanics | 1 | 122 | 1229 | 576 |
| 37 | Polymers | 6 | 120 | 3985 | 4063 |
| 38 | Optics | 9 | 119 | 3913 | 3602 |
| 39 | Diffusion of innovations | 5 | 118 | 38 | 41 |
| 40 | Aging | 2 | 115 | 4288 | 2866 |
| 41 | Green Chemistry | 6 | 108 | 1494 | 2219 |
| 42 | lasers | 8 | 101 | 1369 | 1588 |
| 43 | Biomass Energy | 14 | 99 | 1328 | 3150 |
| 44 | Technological Innovations | 1 | 93 | 2153 | 1107 |
| 45 | Environmental Engineering | 9 | 92 | 2890 | 4622 |
| 46 | Human-Computer Interaction | 1 | 90 | 3000 | 1581 |
| 47 | Biocompatible Materials | 2 | 85 | 4861 | 4842 |
| 48 | Optical materials | 6 | 80 | 2268 | 3185 |
| 49 | Water pollution | 3 | 79 | 3183 | 3599 |
| 50 | Information Science | 2 | 77 | 3622 | 2946 |
| 51 | Global Health | 2 | 76 | 1793 | 1099 |
| 51 | Climate change | 2 | 76 | 1519 | 2057 |
| 51 | marketing | 1 | 76 | 3119 | 2075 |
| 51 | Export Marketing | 1 | 76 | 466 | 346 |
| 55 | Educational Technology | 6 | 71 | 1186 | 1685 |
| 56 | Water | 2 | 69 | 3437 | 3697 |
| 56 | internet | 1 | 69 | 2565 | 1384 |
| 58 | Materials Science | 2 | 65 | 6093 | 5345 |
| 59 | Energy Policy | 3 | 59 | 3074 | 4095 |
| 60 | Pharmacology | 3 | 57 | 6409 | 7128 |
| 61 | Engineering | 6 | 56 | 4202 | 5122 |
| 61 | Drug delivery systems | 2 | 56 | 2181 | 2423 |
| 63 | Total Quality Management | 3 | 55 | 621 | 754 |
| 64 | Surface Chemistry | 6 | 52 | 3285 | 4866 |
| 64 | Colloids | 6 | 52 | 3206 | 5037 |
| 64 | Islam | 3 | 52 | 731 | 403 |
| 67 | nanoscience | 4 | 49 | 3021 | 4180 |
| 68 | Microbial Ecology | 2 | 48 | 3234 | 4149 |
| 68 | human behavior | 2 | 48 | 3504 | 4449 |
| 70 | Quality Control | 3 | 47 | 2252 | 2793 |
| 71 | global environmental change | 1 | 46 | 1719 | 1682 |
| 71 | Mineral resources | 3 | 46 | 664 | 1111 |
| 73 | Agricultural Chemistry | 2 | 45 | 3200 | 3443 |
| 74 | Bioengineering | 2 | 44 | 6082 | 6722 |
| 74 | Green Technology | 2 | 44 | 668 | 674 |
| 76 | Solid State Physics | 3 | 41 | 4253 | 4502 |
| 76 | Composite Materials | 2 | 41 | 3571 | 4012 |
| 76 | Asia | 2 | 41 | 4320 | 3569 |
| 76 | polymerization | 1 | 41 | 5779 | 4777 |
| 80 | Electrochemistry | 1 | 40 | 5696 | 4691 |
| 81 | Biomedical Engineering | 3 | 39 | 6167 | 7422 |
| 82 | ecotourism | 1 | 38 | 488 | 485 |
| 83 | Oncology | 1 | 37 | 4234 | 4433 |
| 83 | Photonics | 2 | 37 | 2375 | 2720 |
| 83 | behavioral medicine | 1 | 37 | 2673 | 2751 |
| 83 | Neural circuitry | 1 | 37 | 3467 | 3217 |
| 83 | commerce | 1 | 37 | 3021 | 2218 |
| 88 | Mathematics | 10 | 36 | 4510 | 6376 |
| 88 | computer networks | 2 | 36 | 3362 | 3264 |
| 90 | Computer Science | 2 | 35 | 3338 | 2955 |
| 90 | Optoelectronics | 7 | 35 | 345 | 650 |
| 90 | Video Games | 1 | 35 | 223 | 106 |
| 90 | Luminescence | 7 | 35 | 1001 | 1988 |
| 94 | Electrical Engineering | 3 | 34 | 4050 | 3614 |
| 94 | Investments | 1 | 34 | 1221 | 860 |
| 96 | Genomics | 1 | 33 | 5892 | 5745 |
| 96 | Chromosome mapping | 1 | 33 | 3586 | 3770 |
| 96 | gene mapping | 1 | 33 | 3888 | 4117 |
| 99 | Heterocyclic chemistry | 8 | 32 | 264 | 672 |
| 99 | Detectors | 2 | 32 | 1609 | 1418 |
| 99 | educational innovations | 1 | 32 | 1063 | 867 |
| 102 | Organometallic chemistry | 7 | 31 | 1563 | 2834 |
| 102 | Health | 3 | 31 | 2910 | 4167 |
| 102 | food industry | 3 | 31 | 795 | 1249 |
| 105 | Computer Engineering | 1 | 30 | 1856 | 1414 |
| 106 | Quantum electronics | 1 | 29 | 2151 | 1396 |
| 106 | Optoelectronic devices | 1 | 29 | 1805 | 1115 |
| 108 | food technology | 4 | 28 | 2690 | 4580 |
| 108 | Earth Sciences | 3 | 28 | 3862 | 4835 |
| 110 | Industrial Microbiology | 1 | 27 | 3629 | 3938 |
| 110 | Nuclear Chemistry | 1 | 27 | 2099 | 1598 |
| 110 | Radiochemistry | 1 | 27 | 2026 | 1460 |
| 110 | Drug targeting | 1 | 27 | 699 | 874 |
| 110 | Zeolites | 2 | 27 | 1309 | 1919 |
| 110 | drug evaluation | 1 | 27 | 2634 | 2664 |
| 116 | Occupational Therapy | 6 | 26 | 773 | 1465 |
| 116 | Occupational Health | 6 | 26 | 847 | 1883 |
| 116 | Industrial Safety | 6 | 26 | 892 | 2121 |
| 116 | industrial hygiene | 6 | 26 | 871 | 1719 |
| 116 | Water quality management | 5 | 26 | 1718 | 3251 |
| 121 | Pharmacognosy | 1 | 24 | 3300 | 3702 |
| 121 | Medicinal plants | 1 | 24 | 2732 | 3067 |
| 121 | water reuse | 2 | 24 | 498 | 834 |
| 124 | Information Technology | 5 | 23 | 2441 | 3941 |
| 125 | Combustion | 1 | 22 | 2169 | 2258 |
| 125 | energy conservation | 3 | 22 | 2358 | 4055 |
| 125 | finance | 4 | 22 | 2344 | 3297 |
| 125 | Heterocyclic compounds | 4 | 22 | 1073 | 1595 |
| 129 | Molecular Pharmacology | 1 | 20 | 1524 | 1965 |
| 129 | Pharmaceutical Chemistry | 2 | 20 | 5297 | 6669 |
| 129 | Drug design | 2 | 20 | 2637 | 3565 |
| 129 | Fiber Optics | 2 | 20 | 801 | 862 |
| 129 | Food | 4 | 20 | 3356 | 5978 |
| 129 | peptides | 1 | 20 | 1904 | 1884 |
| 129 | proteins | 1 | 20 | 3884 | 3993 |
| 136 | Education | 7 | 19 | 3160 | 5647 |
| 136 | Psychology | 5 | 19 | 4918 | 8505 |
| 136 | Structural Engineering | 4 | 19 | 1667 | 2753 |
| 136 | Botany | 5 | 19 | 3702 | 6288 |
| 136 | Robotics | 2 | 19 | 2319 | 2947 |
| 136 | Sustainable Architecture | 9 | 19 | 26 | 313 |
| 136 | Bioorganic chemistry | 6 | 19 | 2487 | 4868 |
| 136 | plant molecular biology | 4 | 19 | 1562 | 3259 |
| 136 | Microwaves | 3 | 19 | 1340 | 1515 |
| 136 | Plants | 4 | 19 | 2320 | 3891 |
| 146 | Petroleum Engineering | 1 | 18 | 1441 | 1517 |
| 146 | Distance Education | 2 | 18 | 715 | 1035 |
| 146 | Solid State Chemistry | 1 | 18 | 3912 | 3952 |
| 146 | Asymmetric synthesis | 5 | 18 | 53 | 303 |
| 150 | Biology | 8 | 17 | 8250 | 15502 |
| 150 | Nuclear Physics | 4 | 17 | 4168 | 5424 |
| 150 | Heat Exchangers | 1 | 17 | 2121 | 2662 |
| 150 | Cheminformatics | 1 | 17 | 743 | 967 |
| 150 | Informatics | 1 | 17 | 1693 | 1915 |
| 155 | Geophysics | 2 | 16 | 4693 | 5974 |
| 155 | Astrophysics | 2 | 16 | 3969 | 4707 |
| 155 | Geochemistry | 2 | 16 | 2616 | 3754 |
| 155 | Geodesy | 2 | 16 | 1167 | 1676 |
| 155 | Investment analysis | 4 | 16 | 753 | 1636 |
| 155 | International Finance | 1 | 16 | 2610 | 2781 |
| 155 | families | 1 | 16 | 1595 | 1608 |
| 155 | Capital market | 1 | 16 | 817 | 1038 |
| 155 | Agriculture | 3 | 16 | 2895 | 4470 |
| 164 | Higher Education | 2 | 15 | 759 | 1160 |
| 164 | Developmental Psychology | 1 | 15 | 1920 | 2202 |
| 164 | environmental indicators | 1 | 15 | 2090 | 2870 |
| 164 | human development | 1 | 15 | 1416 | 1749 |
| 164 | adulthood | 1 | 15 | 251 | 331 |
| 169 | Economics | 3 | 14 | 4819 | 5991 |
| 169 | Education policy | 1 | 14 | 181 | 262 |
| 171 | Data Mining | 3 | 13 | 2180 | 4179 |
| 171 | Economic History | 1 | 13 | 6239 | 5471 |
| 171 | Quantum Gravity | 1 | 13 | 2819 | 2887 |
| 171 | Eating Disorders | 3 | 13 | 992 | 1975 |
| 171 | Feeding and Eating Disorders | 3 | 13 | 950 | 1903 |
| 176 | Knowledge management | 3 | 12 | 684 | 1377 |
| 176 | Corporate governance | 1 | 12 | 1202 | 1527 |
| 176 | mass transfer | 4 | 12 | 1690 | 3303 |
| 176 | Obesity | 2 | 12 | 2946 | 4871 |
| 176 | Calorimetry | 3 | 12 | 1466 | 2540 |
| 176 | organizational effectiveness | 1 | 12 | 914 | 1097 |
| 176 | feeding behavior | 1 | 12 | 1435 | 1986 |
| 176 | geological modeling | 1 | 12 | 1174 | 1348 |
| 176 | corporate culture | 1 | 12 | 422 | 626 |
| 176 | Thermal analysis | 3 | 12 | 1466 | 2540 |
| 186 | Geriatrics | 1 | 11 | 5662 | 5999 |
| 186 | Social Psychology | 1 | 11 | 3773 | 4410 |
| 186 | Surface-Active Agents | 1 | 11 | 2087 | 2930 |
| 186 | Environmental Geochemistry | 2 | 11 | 889 | 1731 |
| 186 | Access to Information | 1 | 11 | 435 | 743 |
| 186 | big data | 1 | 11 | 1282 | 1489 |
| 186 | Gerontology | 1 | 11 | 3824 | 3905 |
| 186 | civilization | 1 | 11 | 2496 | 1223 |
| 186 | Surface properties | 1 | 11 | 2189 | 3036 |
| 186 | Social behavior | 1 | 11 | 2240 | 2701 |
| 186 | Sociobiology | 1 | 11 | 609 | 669 |
| 186 | Nonprofit organizations | 1 | 11 | 661 | 937 |
| 186 | Minerals | 2 | 11 | 1229 | 2153 |
| 186 | Information dissemination | 1 | 11 | 435 | 743 |
| 186 | Behavior | 1 | 11 | 5646 | 7112 |
| 201 | Social Sciences | 4 | 10 | 4113 | 6632 |
| 201 | Nursing | 1 | 10 | 3788 | 4083 |
| 201 | Dynamics | 1 | 10 | 3380 | 3459 |
| 201 | System analysis | 1 | 10 | 4496 | 5095 |
| 201 | Plastics | 1 | 10 | 3118 | 3517 |
| 201 | Safety management | 1 | 10 | 1491 | 1787 |
| 201 | scientific societies | 1 | 10 | 1723 | 2295 |
| 201 | drug toxicity | 1 | 10 | 1078 | 1668 |
| 209 | gene therapy | 1 | 9 | 2239 | 3046 |
| 209 | plasma spraying | 1 | 9 | 541 | 768 |
| 209 | Genetic therapy | 1 | 9 | 2361 | 3176 |
| 212 | Genetic engineering | 2 | 8 | 3164 | 5176 |
| 212 | Metallurgy | 2 | 8 | 3292 | 4463 |
| 212 | Renewable Energy Sources | 2 | 8 | 3655 | 5962 |
| 212 | Molecular cloning | 2 | 8 | 2167 | 3672 |
| 212 | Genetic recombination | 2 | 8 | 2127 | 3631 |
| 212 | actuators | 1 | 8 | 3668 | 4763 |
| 212 | Telecommunication | 1 | 8 | 4187 | 4319 |
| 212 | Recombinant DNA | 2 | 8 | 2266 | 3841 |
| 212 | Molecular structure | 1 | 8 | 4382 | 5124 |
| 212 | transducers | 1 | 8 | 3668 | 4763 |
| 212 | Biodiversity | 1 | 8 | 4144 | 5094 |
| 223 | Behavioral research | 1 | 7 | 1170 | 1737 |
| 223 | Socioeconomic Factors | 1 | 7 | 1657 | 2585 |
| 223 | Plant physiology | 1 | 7 | 3458 | 4479 |
| 223 | Marriage | 1 | 7 | 1028 | 1481 |
| 223 | Family | 1 | 7 | 1790 | 2419 |
| 228 | Mechanical Engineering | 2 | 6 | 3502 | 4760 |
| 228 | Cytology | 1 | 6 | 6778 | 8508 |
| 228 | Engineering Mathematics | 1 | 6 | 4463 | 4980 |
| 228 | Numerical Analysis | 1 | 6 | 3972 | 4482 |
| 228 | Sedimentology | 1 | 6 | 1240 | 1757 |
| 228 | Cell Biology | 1 | 6 | 6508 | 8296 |
| 228 | Organizational learning | 2 | 6 | 798 | 1653 |
| 228 | Wireless Communication Systems | 1 | 6 | 3507 | 3989 |
| 228 | Semiconductors | 1 | 6 | 3595 | 4242 |
| 228 | soil pollution | 1 | 6 | 1280 | 1855 |
| 228 | Environmental risk assessment | 1 | 6 | 984 | 1558 |
| 228 | Teaching | 2 | 6 | 2571 | 3969 |
| 228 | environmental control | 1 | 6 | 546 | 921 |
| 228 | Learning | 2 | 6 | 1894 | 3388 |
| 228 | Spectrum analysis | 1 | 6 | 6670 | 8017 |
| 228 | Fluorescence | 1 | 6 | 1081 | 1474 |
| 244 | Nuclear Engineering | 1 | 5 | 2274 | 2679 |
| 244 | Nuclear Energy | 1 | 5 | 2114 | 2458 |
| 244 | Mineralogy | 1 | 5 | 2364 | 2951 |
| 244 | Computational Biology | 2 | 5 | 4396 | 6977 |
| 244 | Statistical Mechanics | 1 | 5 | 2268 | 2535 |
| 244 | Computational Intelligence | 1 | 5 | 2085 | 2682 |
| 244 | Simulation Methods | 1 | 5 | 2083 | 2770 |
| 244 | Radiation | 2 | 5 | 3241 | 5072 |
| 244 | economic policy | 1 | 5 | 4429 | 4833 |
| 244 | Industrial Policy | 1 | 5 | 967 | 1366 |
| 244 | Taste | 1 | 5 | 670 | 1104 |
| 244 | Radioisotopes | 2 | 5 | 1808 | 2991 |
| 244 | Islamic philosophy | 1 | 5 | 48 | 16 |
| 244 | Financial Institutions | 1 | 5 | 862 | 1208 |
| 244 | smell | 1 | 5 | 670 | 1104 |
| 244 | Statistical physics | 1 | 5 | 5528 | 6473 |
| 244 | Condensed Matter | 1 | 5 | 5003 | 5717 |
| 244 | Food preferences | 1 | 5 | 763 | 1274 |
| 244 | Islamic civilization | 1 | 5 | 367 | 139 |
| 244 | Metals | 1 | 5 | 3636 | 4400 |
| 264 | Ethics | 1 | 4 | 2006 | 2861 |
| 264 | Electronics | 2 | 4 | 4787 | 6614 |
| 264 | Clinical Biochemistry | 1 | 4 | 2601 | 3461 |
| 264 | Sports Medicine | 1 | 4 | 4384 | 5179 |
| 264 | Medical Ethics | 1 | 4 | 2379 | 3245 |
| 264 | starch | 1 | 4 | 739 | 1194 |
| 264 | Communication | 2 | 4 | 2933 | 4791 |
| 264 | rehabilitation | 1 | 4 | 4154 | 5682 |
| 264 | Exercise | 1 | 4 | 2563 | 3273 |
| 273 | Genetics | 1 | 3 | 6792 | 8737 |
| 273 | Medical Technology | 2 | 3 | 2831 | 5619 |
| 273 | Soil Mechanics | 2 | 3 | 1564 | 2573 |
| 273 | Rock Mechanics | 2 | 3 | 1279 | 2181 |
| 273 | Catalysis | 1 | 3 | 5017 | 6360 |
| 273 | Engineering Geology | 1 | 3 | 2409 | 3259 |
| 273 | Educational Psychology | 1 | 3 | 2503 | 3491 |
| 273 | diffusion | 1 | 3 | 778 | 771 |
| 273 | Virology | 1 | 3 | 5415 | 7335 |
| 273 | Mitochondrial DNA | 4 | 3 | 152 | 806 |
| 273 | Instructional materials | 1 | 3 | 129 | 299 |
| 273 | Decision making | 2 | 3 | 2271 | 4599 |
| 273 | Europe | 3 | 3 | 4128 | 7709 |
| 286 | Neurology | 1 | 2 | 8380 | 10432 |
| 286 | Law | 1 | 2 | 2912 | 2989 |
| 286 | Civil Engineering | 1 | 2 | 3549 | 4350 |
| 286 | Nutrition | 1 | 2 | 7573 | 9923 |
| 286 | Sociology | 1 | 2 | 5829 | 7772 |
| 286 | Geology | 1 | 2 | 4795 | 6215 |
| 286 | Obstetrics | 2 | 2 | 3580 | 6094 |
| 286 | Cosmology | 2 | 2 | 1908 | 2679 |
| 286 | Biochemical Engineering | 1 | 2 | 5385 | 7494 |
| 286 | Social welfare | 1 | 2 | 1285 | 2166 |
| 286 | Nanoparticles | 1 | 2 | 3347 | 4761 |
| 286 | data collection | 1 | 2 | 2613 | 4121 |
| 286 | bioluminescence | 3 | 2 | 417 | 1473 |
| 286 | Reproduction | 2 | 2 | 3297 | 5716 |
| 286 | China | 1 | 2 | 5353 | 7401 |
| 286 | Social work | 1 | 2 | 2882 | 4176 |
| 302 | Arts | 1 | 1 | 1166 | 1324 |
| 302 | Public Health | 1 | 1 | 10686 | 13827 |
| 302 | Cloud Computing | 1 | 1 | 578 | 1196 |
| 302 | Hydrology | 1 | 1 | 4431 | 6134 |
| 302 | Soil Science | 1 | 1 | 3289 | 4615 |
| 302 | Environmental Geology | 1 | 1 | 2931 | 4206 |
| 302 | Systems Biology | 1 | 1 | 3262 | 5036 |
| 302 | Physical organic chemistry | 1 | 1 | 2369 | 3377 |
| 302 | Diabetes mellitus | 1 | 1 | 3948 | 5775 |
| 302 | Mass Media | 1 | 1 | 1821 | 2326 |
| 302 | adolescence | 1 | 1 | 1754 | 2872 |
| 302 | Adolescent Psychology | 1 | 1 | 1664 | 2701 |
| 302 | Water Microbiology | 1 | 1 | 1115 | 2146 |
| 302 | Korea | 1 | 1 | 821 | 1412 |
| 302 | Adolescent | 1 | 1 | 4174 | 6014 |
| 302 | press | 1 | 1 | 291 | 470 |
| 302 | construction industry | 1 | 1 | 329 | 656 |
| 302 | Youth | 1 | 1 | 1256 | 2110 |
| 302 | Insects | 1 | 1 | 2647 | 3718 |
| 302 | Entomology | 1 | 1 | 4008 | 5341 |
| 302 | Egypt | 1 | 1 | 1205 | 2295 |
| 302 | Diabetes | 1 | 1 | 4068 | 5848 |
| 324 | Cybernetics | 1 | 0 | 2603 | 4009 |
| 324 | Neurogenetics | 1 | 0 | 737 | 1354 |
| 324 | Biosensors | 1 | 0 | 2322 | 3614 |
| 324 | Mathematical Physics | 2 | 0 | 4149 | 6117 |
| 324 | Social History | 1 | 0 | 1039 | 1397 |
| 324 | Signal Processing | 2 | 0 | 2861 | 5178 |
| 324 | Social Networks | 1 | 0 | 768 | 1475 |
| 324 | Image Processing | 1 | 0 | 3671 | 5383 |
| 324 | Neurophysiology | 1 | 0 | 4775 | 6692 |
| 324 | Online social networks | 1 | 0 | 760 | 1574 |
| 324 | Bioinformatics | 1 | 0 | 3835 | 5625 |
| 324 | Broadcast Journalism | 1 | 0 | 80 | 154 |
| 324 | Islamic education | 1 | 0 | 116 | 157 |
| 324 | Chemical processes | 1 | 0 | 1320 | 2254 |
| 324 | Nervous system | 1 | 0 | 4451 | 6522 |
| 324 | Plant diseases | 1 | 0 | 3254 | 4643 |
| 324 | United States | 1 | 0 | 10154 | 13505 |
| 324 | Longevity | 1 | 0 | 445 | 1035 |
| 324 | Natural history | 1 | 0 | 7355 | 10132 |
| 324 | rejuvenation | 1 | 0 | 331 | 775 |
| 324 | Structure-activity relationship | 1 | 0 | 1027 | 1756 |
