1. From the Ifakara Health Research and Development Centre, Ifakara, Tanzania (BI, HM, HU, EK, HM, and DMS); the St Francis Designated District Hospital, Ministry of Health, Ifakara, Tanzania (WB); the Nutritional Intervention Research Unit, Medical Research Council, Parow, Republic of South Africa (PvJ); the Hospital Clinic Center for International Health, University of Barcelona, Barcelona, Spain