1. Heidelberg Institute of Global Health, Heidelberg University, Germany
2. Institute of Applied Health Research, University of Birmingham, UK
3. MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
4. AGE Research Group, NIHR Newcastle Biomedical Research Centre, Translational and Clinical Research Institute, Newcastle University and Newcastle upon Tyne Hospitals NHS Trust, UK
5. Harvard Center for Population and Development Studies, Cambridge, Massachusetts, USA
6. Institute for Global Health, University College London, UK
7. Centre de Recherche en Santé de Nouna, Burkina Faso
8. Africa Health Research Institute, KwaZulu-Natal, South Africa
9. Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, USA
10. School of Demography, Australian National University, Canberra, Australian Capital Territory, Australia
11. Population Studies Center and Department of Sociology, University of Pennsylvania, Philadelphia, USA