1. Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts;
2. Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts;
3. Department of Biostatistics, Harvard School of Public Health, Boston, Massachusetts;
4. Department of Global Health and Population, Harvard School of Public Health, Boston, Massachusetts;
5. Management and Development for Health, Dar es Salaam, Tanzania;
6. Center for Nutrition, Boston Children’s Hospital, Boston, Massachusetts;
7. School of Medicine, Muhimbili University of Health and Allied Sciences (MUHAS), Dar es Salaam, Tanzania