1. Botswana Harvard Health Partnership, Gaborone, Botswana;
2. Center for Biostatistics in AIDS Research, Harvard TH Chan School of Public Health, Boston, MA;
3. University of Hawai'i Cancer Center, Honolulu, HI;
4. University of Zimbabwe Clinical Trials Research Centre, Harare, Zimbabwe;
5. FHI 360, Durham, NC;
6. Family Centre for Research with Ubuntu (FAMCRU), Stellenbosch University, Cape Town, South Africa;
7. Department of Obstetrics and Gynaecology, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa;
8. Frontier Science & Technology Research Foundation, Inc, Amherst, NY;
9. National Institute of Allergy and Infectious Diseases, Rockville, MD;
10. National Institute of Child Health and Human Development, Bethesda, MD;
11. Perinatal HIV Research Unit, University of the Witwatersrand, Johannesburg, South Africa;
12. Makerere University–Johns Hopkins University Research Collaboration, Kampala, Uganda;
13. David Geffen School of Medicine, University of California, Los Angeles, CA;
14. Wits Reproductive Health and HIV Institute, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa;
15. UNC Project–Malawi, Lilongwe, Malawi;
16. Division of Infectious Diseases, Brigham and Women's Hospital, Boston, MA;
17. Harvard Medical School, Boston, MA; and
18. Child and Adolescent Health Unit, Faculty of Medicine and Health Sciences, University of Zimbabwe, Harare, Zimbabwe.