1. DSI-MRC South African Population Infrastructure Network, Durban, South Africa
2. Population Science, Africa Health Research Institute, Durban, KwaZulu-Natal, South Africa
3. KEM Hospital Research Centre, Vadu Rural Health Program, Pune, India
4. Medical Research Council Unit, The Gambia at London School of Hygiene and Tropical Medicine, Fajara, The Gambia
5. Addis Continental Institute of Public Health, Addis Ababa, Ethiopia
6. Family Medicine Department, Hanoi Medical University, Hanoi, Vietnam
7. Department of Global Health and Development, London School of Hygiene and Tropical Medicine, London, UK
8. Statistics Sierra Leone, Tower Hill, Freetown, Sierra Leone
9. Njala University, University Secretariat, Njala, Sierra Leone
10. School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
11. Heidelberg Institute of Global Health, University of Heidelberg Medical School, Heidelberg, Germany
12. Department of Sociology, The Ohio State University, Columbus, Ohio, USA
13. SAMRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, South Africa