1. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia
2. Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia
3. Department of Anthropology, University of Washington, Seattle, Washington
4. Department of Epidemiology and Biostatistics, School of Public Health, University of Albany, Albany, New York
5. Bridge HIV, Population Health Division, San Francisco Department of Public Health, San Francisco, California
6. Department of Epidemiology, School of Public Health, University of Washington, Seattle, Washington