Makerere University - Johns Hopkins University Research Collaboration, University of KwaZulu-Natal - Centre for the AIDS Programme of Research in South Africa (CAPRISA), Parirenyatwa Group of Hospitals, Johns Hopkins Bloomberg School of Public Health, Malawi, Makerere University - Johns Hopkins University Research Collaboration, Makerere University - Johns Hopkins University Research Collaboration, Johns Hopkins University - Department of Epidemiology, Johns Hopkins University - Johns Hopkins Bloomberg School of Public Health, University of the Witwatersrand - South African Medical Research Council /Wits Developmental Pathways for Health Research Unit,, Harvard University - Harvard TH Chan School of Public Health, Johns Hopkins University, School of Medicine, Division of Endocrinology, Diabetes, & Metabolism, Johns Hopkins University - School of Medicine and Independent