1. School of Demography, The Australian National University, Canberra, Australia
2. MRC/Wits Rural Public Health and Health Transitions Research Unit (Agincourt), School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
3. CU Population CenterInstitute of Behavioral Science, University of Colorado at Boulder, Boulder, CO, USA
4. Department of Sociology, University of Michigan, Ann Arbor, MI, USA
5. Population Studies Center, Institute for Social Research, University of Michigan, Ann Arbor, MI, USA
6. Department of Sociology and Center on Health, Risk and Society, American University, Washington, DC, USA
7. Department of Health Sciences, University of Missouri, Columbia, MO, USA
8. INDEPTH Network, Accra, Ghana
9. Department of Sociology, The Ohio State University, Columbus, OH, USA
10. ALPHA NetworkLondon School of Hygiene and Tropical Medicine, London, UK
11. Umeå Centre for Global Public Health Research, Division of Epidemiology and Global Health, Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden