1. Department of Biostatistics, University of North Carolina at Chapel Hill
2. School of Medicine, University of North Carolina at Chapel Hill
3. Department of Epidemiology, University of North Carolina at Chapel Hill
4. Stroger Hospital
5. Albert Einstein College of Medicine
6. SUNY Downstate Medical Center
7. Department of Infectious Diseases, Georgetown University
8. Keck School of Medicine, University of Southern California
9. Department of Medicine, University of California, San Francisco
10. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health
11. Department of Medicine, Emory University
12. Division of Infectious Diseases, University of Miami Miller School Medicine
13. The University of Alabama at Birmingham