1. Department of Epidemiology, Milken Institute School of Public Health, The George Washington University, Washington, DC, USA
2. The HIV/AIDS, Hepatitis, STD and TB Administration (HAHSTA), District of Columbia Department of Health, Washington, DC, USA
3. Rutgers University School of Communication and Information, New Brunswick, NJ, USA
4. Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, USA
5. Emory University School of Medicine, Atlanta, GA, USA
6. University of Miami Miller School of Medicine, Miami, FL, USA
7. Johns Hopkins University School of Medicine, Baltimore, MD, USA
8. University of California San Francisco School of Medicine, San Francisco, CA, USA