1. Department of Community Health and Health Behavior, University at Buffalo, Buffalo, NY, USA
2. Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania and Gillings School of Global Public Health, UNC-Chapel Hill, NC, USA
3. UNICEF Office of Research, Innocenti, Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
4. Department of Epidemiology and Environmental Health, University at Buffalo, Buffalo, NY, USA
5. London School of Hygiene and Tropical Medicine, London, UK
6. School of Nursing, University at Buffalo, Buffalo, NY, USA
7. School of International Service, American University, WA, DC, USA