1 Department of Epidemiology, Boston University School of Public Health, Boston, MA, USA; Department of Global Health, Boston University School of Public Health, Boston, MA, USA.
2 Department of International Health, International Center for Maternal and Newborn Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
3 Division of Global Health, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
4 Department of International Health, International Center for Maternal and Newborn Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA; Department of Pediatrics, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
5 Department of Nutritional Sciences, The Hospital for Sick Children, Research Centre for Global Child Health, University of Toronto, Toronto, ON, Canada.
6 Department of Global Health, Boston University School of Public Health, Boston, MA, USA. Electronic address: dthea@bu.edu.