1. Bill & Melinda Gates Foundation Seattle Washington USA
2. Department of Epidemiology University of North Carolina‐Chapel Hill Chapel Hill North Carolina USA
3. Department of Global Health University of Washington Seattle Washington USA
4. Wits RHI, Faculty of Health Sciences University of the Witwatersrand Johannesburg South Africa
5. Massachusetts General Hospital Boston Massachusetts USA
6. Creighton University School of Medicine Phoenix Arizona USA
7. Kenya Medical Research Institute Nairobi Kenya
8. Harvard Medical School Boston Massachusetts USA