The Ragon Institute of MGH, MIT and Harvard, Ragon Institute of MGH, MIT and Harvard, University of Washington - Department of Medicine, University of Washington - Department of Medicine, Johns Hopkins Bloomberg School of Public Health - Department of International Health, George Washington University - Department of Global Health, Nepal Nutrition Intervention Project, Johns Hopkins Bloomberg School of Public Health - Department of International Health, University of Washington - Department of Pediatrics, University of Washington - Division of Allergy and Infectious Diseases and MassachusettsGeneral Hospital - Ragon Institute of MGH, MIT and Harvard