| Organ Donation and Transplantation | Lifetime | 2 | US 2 | 99.94 |
| Renal Transplantation Outcomes and Treatments | Lifetime | 4 | US 4 | 99.91 |
| Organ Transplantation Techniques and Outcomes | Lifetime | 7 | US 5 | 99.93 |
| Renal and Vascular Pathologies | Lifetime | 6 | US 4 | 99.89 |
| Liver Disease and Transplantation | Lifetime | 73 | US 30 | 99.72 |
| SARS-CoV-2 and COVID-19 Research | Lifetime | 302 | US 115 | 98.87 |
| COVID-19 Clinical Research Studies | Lifetime | 339 | US 89 | 98.55 |
| Neurological Complications and Syndromes | Lifetime | 49 | US 26 | 98.81 |
| Frailty in Older Adults | Lifetime | 125 | US 59 | 98.70 |
| Dialysis and Renal Disease Management | Lifetime | 167 | US 79 | 99.07 |
| Nutrition and Health in Aging | Lifetime | 458 | US 174 | 98.35 |
| Transplantation: Methods and Outcomes | Lifetime | 305 | US 188 | 98.29 |
| Pregnancy and Medication Impact | Lifetime | 227 | US 96 | 97.31 |
| Blood donation and transfusion practices | Lifetime | 92 | US 47 | 97.43 |
| COVID-19 and healthcare impacts | Lifetime | 922 | US 328 | 92.07 |
| COVID-19 Impact on Reproduction | Lifetime | 391 | US 157 | 92.76 |
| Polyomavirus and related diseases | Lifetime | 878 | US 415 | 94.06 |
| Renal Transplantation Outcomes and Treatments | 2021-2025 | 4 | US 2 | 99.76 |
| Organ Donation and Transplantation | 2021-2025 | 5 | US 4 | 99.44 |
| SARS-CoV-2 and COVID-19 Research | 2021-2025 | 123 | US 42 | 99.42 |
| Organ Transplantation Techniques and Outcomes | 2021-2025 | 33 | US 11 | 99.00 |
| COVID-19 Clinical Research Studies | 2021-2025 | 272 | US 75 | 98.67 |
| Renal and Vascular Pathologies | 2021-2025 | 38 | US 12 | 97.83 |
| Animal Virus Infections Studies | 2021-2025 | 90 | US 33 | 96.65 |
| Viral Infections and Immunology Research | 2021-2025 | 181 | US 57 | 93.29 |
| Neurological and metabolic disorders | 2021-2025 | 31 | US 9 | 88.87 |
| SARS-CoV-2 detection and testing | 2021-2025 | 513 | US 123 | 91.49 |
| Transplantation: Methods and Outcomes | 2021-2025 | 377 | US 230 | 92.87 |
| Neurological Complications and Syndromes | 2021-2025 | 103 | US 23 | 86.52 |
| COVID-19 Impact on Reproduction | 2021-2025 | 580 | US 205 | 85.97 |
| Dialysis and Renal Disease Management | 2021-2025 | 819 | US 185 | 87.75 |
| Pregnancy and Medication Impact | 2021-2025 | 399 | US 129 | 84.21 |
| HIV/AIDS drug development and treatment | 2021-2025 | 823 | US 275 | 83.60 |
| Parathyroid Disorders and Treatments | 2021-2025 | 864 | US 221 | 79.96 |
| Blood donation and transfusion practices | 2021-2025 | 410 | US 112 | 72.15 |
| Organ and Tissue Transplantation Research | 2021-2025 | 566 | US 274 | 50.48 |
| Xenotransplantation and immune response | 2021-2025 | 351 | US 171 | 50.59 |
