Centre for the AIDS Programme of Research in Africa (CAPRISA), University of KwaZulu- Natal, University of Washington, University of Oxford - Nuffield Department of Primary Care Health Sciences, eThekwini Municipality Health Unit, University of Washington, Washington University in St. Louis, Centre for the AIDS Programme of Research in South Africa (CAPRISA), Centre for the AIDS Programme of Research in South Africa (CAPRISA), Centre for the AIDS Programme of Research in South Africa (CAPRISA), Centre for the AIDS Programme of Research in South Africa (CAPRISA), University of KwaZulu-Natal - Centre for the AIDS Programme of Research in South Africa (CAPRISA), University of Washington, Bethesda - MD, University of KwaZulu-Natal, Fred Hutchinson Cancer Research Center, University of KwaZulu-Natal - Centre for the AIDS Programme of Research in South Africa (CAPRISA), University of KwaZulu-Natal - Centre for the AIDS Programme of Research in South Africa (CAPRISA)University of the Witwatersrand - South African Medical Research Council, University of Washington, University of KwaZulu-Natal, University of California, San Francisco (UCSF) - Division of HIV, Infectious Diseases and Global Medicine, University of KwaZulu-Natal, Chiang Mai University and University of Washington - Department of Global Health

University College London - MRC Clinical Trials Unit, University College London - MRC Clinical Trials Unit, University of the Witwatersrand - Perinatal HIV Research Unit, Department of Paediatrics, University of Zimbabwe, Baylor University - Children's Foundation Uganda, Joint Clinical Research Centre, Mbarara, Joint Clinical Research Centre, Mahasarakam Hospital, Makerere University - Johns Hopkins University Research Collaboration, University of the Witwatersrand - Department of Internal Medicine, University of KwaZulu-Natal, Stellenbosch University, Chulalongkorn University - Center of Excellence in Pediatric Infectious Diseases and Vaccines, University of Zimbabwe, Baylor University - Children's Foundation Uganda, Joint Clinical Research Centre, Chris Hani Baragwanath Academic Hospital, Goethe University, University Hospitals Birmingham NHS Foundation Trust, Research on AIDS and Viral Hepatitis (ANRS), University College London - Infection, Immunity and Inflammation Research & Teaching Department, Chiang Mai University, Makerere University - Johns Hopkins University Research Collaboration, Joint Clinical Research Centre, London School of Hygiene & Tropical Medicine - Department of Clinical Research, University of Padua - Department of Women’s and Children’s Health, University of Padua, University College London - MRC Clinical Trials Unit and University College London - MRC Clinical Trials Unit