| HIV/AIDS Research and Interventions | 20 |
| Urban, Neighborhood, and Segregation Studies | 19 |
| Homelessness and Social Issues | 18 |
| HIV, Drug Use, Sexual Risk | 13 |
| Race, History, and American Society | 10 |
| Legal Studies and Policies | 10 |
| Housing Market and Economics | 9 |
| American History and Culture | 9 |
| Genomics and Phylogenetic Studies | 9 |
| Mycorrhizal Fungi and Plant Interactions | 9 |
| Urban Transport and Accessibility | 9 |
| Pancreatitis Pathology and Treatment | 8 |
| Housing, Finance, and Neoliberalism | 8 |
| Plant Pathogens and Fungal Diseases | 8 |
| Urban Transport Systems Analysis | 8 |
| LGBTQ Health, Identity, and Policy | 7 |
| Transportation Planning and Optimization | 6 |
| Adolescent Sexual and Reproductive Health | 6 |
| Climate Change and Health Impacts | 6 |
| Urbanization and City Planning | 6 |