1. Department of Nutrition, Gillings School of Global Public Health; University of North Carolina; Chapel Hill North Carolina USA
2. UNC Project-Malawi; Lilongwe Malawi
3. Department of Health Behavior, Gillings School of Global Public Health; University of North Carolina; Chapel Hill North Carolina USA
4. Department of Medicine, School of Medicine; University of North Carolina; Chapel Hill North Carolina USA
5. Carolina Population Center; University of North Carolina; Chapel Hill North Carolina USA