1. Department of Global Health Boston University School of Public Health Boston MA USA
2. Department of Epidemiology Boston University School of Public Health Boston MA USA
3. Health Economics and Epidemiology Research Office Department of Internal Medicine School of Clinical Medicine Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
4. Kenya Medical Research Institute/U.S. Army Medical Research Directorate‐Africa Nairobi Kenya
5. Henry Jackson Foundation MRI Kericho Kenya
6. Wits Reproductive Health and HIV Institute Department of Internal Medicine School of Clinical Medicine Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
7. Bill and Melinda Gates Foundation Seattle WA USA