1. Africa Health Research Institute, KwaZulu-Natal, South Africa
2. London School of Hygiene and Tropical Medicine, Faculty of Epidemiology and Population Health, London, UK
3. Institute for Global Health, University College London, London, UK
4. MRC/Wits Rural Public Health & Health Transitions Research Unit (Agincourt), University of the Witwatersrand, Johannesburg, South Africa
5. Department of Epidemiology & Harvard Centre for Population and Development Studies, Harvard T.H. Chan School of Public Health, Boston, MA, USA
6. Harvard Medical School, Boston, MA, USA
7. Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
8. SAPRIN, South African Medical Research Council, Cape Town, South Africa