| 1 | Immunology (Northwestern University) | 166 | 14.5K | 2 | 2 |
| 2 | Otolaryngology (Northwestern University) | 106 | 9.6K | 5 | 2 |
| 3 | Asthma (Johns Hopkins University) | 42 | 4.8K | 6 | 3 |
| 4 | Head and Neck Surgery (Northwestern University) | 53 | 4.2K | 4 | 1 |
| 5 | Clinical Immunology (Johns Hopkins University) | 22 | 2.6K | 20 | 7 |
| 6 | Immunology (Johns Hopkins University) | 8 | 926 | 294 | 230 |
| 7 | Critical Care Medicine (Johns Hopkins University) | 5 | 496 | 794 | 547 |
| 8 | Otolaryngology (Johns Hopkins University) | 6 | 447 | 405 | 328 |
| 8 | Head and Neck Surgery (Johns Hopkins University) | 6 | 447 | 357 | 292 |
| 10 | Immunology (North Western University) | 1 | 426 | 1 | 1 |
| 11 | Clinical Immunology (Harvard University) | 2 | 359 | 69 | 103 |
| 12 | Immunology (Showa Medical University) | 2 | 150 | 23 | 20 |
| 13 | Dermatology (Johns Hopkins University) | 1 | 139 | 392 | 293 |
| 13 | Oncology (Johns Hopkins University) | 1 | 139 | 3,311 | 3,071 |
| 13 | Dermatology (Northwestern University) | 1 | 139 | 444 | 302 |
| 13 | Oncology (Northwestern University) | 1 | 139 | 870 | 873 |
| 13 | Clinical Immunology (Northwestern University) | 1 | 139 | 4 | 2 |
| 18 | Dentistry (University of Rochester) | 3 | 135 | 2,343 | 2,411 |
| 19 | Otolaryngology (Ann & Robert H. Lurie Children's Hospital of Chicago) | 4 | 129 | 23 | 12 |
| 20 | Microbiology (Northwestern University) | 2 | 122 | 348 | 424 |
| 21 | Pharmacology (Johns Hopkins University) | 2 | 96 | 743 | 1,142 |
| 22 | Pharmacology (Northwestern University) | 2 | 89 | 242 | 366 |
| 23 | Immunology (Vanderbilt University) | 2 | 84 | 921 | 1,007 |
| 23 | Microbiology (Vanderbilt University) | 2 | 84 | 846 | 954 |
| 25 | Pharmacy (University of London) | 1 | 78 | 647 | 578 |
| 26 | Pharmacology (University of California, Davis) | 1 | 72 | 429 | 446 |
| 26 | Medical Microbiology (University of California, Davis) | 1 | 72 | 233 | 207 |
| 28 | Microbiology (Columbia University) | 1 | 71 | 512 | 607 |
| 28 | Immunology (Columbia University) | 1 | 71 | 441 | 528 |
| 28 | Microbiology (Johns Hopkins University) | 1 | 71 | 193 | 401 |
| 28 | Microbiology (Showa Medical University) | 1 | 71 | 49 | 58 |
| 28 | Critical Care Medicine (Vanderbilt University) | 1 | 71 | 421 | 429 |
| 28 | Critical Care Medicine (Columbia University) | 1 | 71 | 156 | 149 |
| 28 | Critical Care Medicine (Showa Medical University) | 1 | 71 | 16 | 7 |
| 28 | Clinical Immunology (Vanderbilt University) | 1 | 71 | 3 | 22 |
| 28 | Clinical Immunology (Columbia University) | 1 | 71 | 9 | 10 |
| 28 | Clinical Immunology (Showa Medical University) | 1 | 71 | 9 | 26 |
| 28 | Asthma (Showa Medical University) | 1 | 71 | 1 | 1 |
| 28 | Asthma (Vanderbilt University) | 1 | 71 | 25 | 21 |
| 28 | Asthma (Columbia University) | 1 | 71 | 1 | 1 |
| 41 | Asthma (Dokkyo University) | 1 | 57 | 1 | 1 |
| 42 | Pathology (Harvard University) | 2 | 46 | 4,973 | 8,405 |
| 42 | Asthma (McMaster University) | 1 | 46 | 66 | 87 |
