1. Medical Research Council/Uganda Virus Research Institute and London School of Hygiene & Tropical Medicine, Uganda Research Unit, Entebbe, Uganda
2. University of Zimbabwe Clinical Trials Research Centre, Harare, Zimbabwe
3. Desmond Tutu HIV Centre, Faculty of Health Sciences, University of Cape Town, South Africa
4. Mortimer Market Centre, Central North West London NHS Trust, London, United Kingdom
5. Perinatal HIV Research Unit (PHRU), School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
6. MRC International Statistics and Epidemiology Group, Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, United Kingdom
7. King’s College London, United Kingdom
8. Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, United Kingdom