1. Department of Obstetrics Gynecology & Reproductive Sciences University of California San Francisco San Francisco CA USA
2. Department of Medicine Center for AIDS Prevention Studies University of California San Francisco San Francisco CA USA
3. Infectious Diseases Research Collaboration Kampala Uganda
4. Kenya Medical Research Institute Nairobi Kenya
5. Division of HIV Department of Medicine Infectious Diseases, and Global Medicine University of California San Francisco San Francisco CA USA
6. School of Medicine Makerere University Kampala Uganda
7. Divisions of Biostatistics and Epidemiology School of Public Health University of California Berkeley Berkeley CA USA