1. Department of Global Health, and Center for the Study of Demography and Ecology, University of Washington, Seattle, WA, USA
2. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
3. Ifakara Health Institute, Dar es Salaam, Tanzania
4. Department of Global Health, University of Washington, Seattle, WA, USA
5. Department of Population and Family Health, Mailman School of Public Health, Columbia University, New York, NY, USA