1. Division of Pediatric Endocrinology and Diabetes (S.B., A.M., M.F.), Duke University Medical Center, Durham North Carolina 27705;
2. the Pediatric Division of Quantitative Sciences and the Duke Clinical Research Institute (C.H.), Duke University Medical Center, Durham North Carolina 27705;
3. the Sarah W. Stedman Nutrition and Metabolism Center (J.B., M.M., R.S., C.B.N., M.F.), Duke University Medical Center, Durham North Carolina 27705;
4. the Mwanamugimu Nutrition Unit (T.K., E.K.), Mulago Hospital Complex, Kampala, Uganda;
5. the Duke Global Health Institute (J.B., M.F.), Duke University Medical Center, Durham North Carolina 27705;
6. Department of Global Research and Development (J.V.S.P.), Long Term Research, PepsiCo, Inc, Purchase, New York 10577