1. Department of Epidemiology and Biostatistics, University of California, San Francisco.
2. Population Council, Washington, D.C.
3. Wits Reproductive Health and HIV Institute, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa.
4. Sonke Gender Justice, Cape Town, South Africa.
5. MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
6. Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill.
7. School of Health, University of New England, New South Wales, Australia.
8. Center for AIDS Prevention Studies, Department of Medicine, University of California, San Francisco.
9. Department of Health Behavior, Gillings School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill.