1 Department of Epidemiology and Environmental Health, University at Buffalo, The State University of New York, Buffalo, NY 14214, USA. Electronic address: [email protected].
2 Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
3 Department of Global Health and Development, London School of Hygiene & Tropical Medicine, London, UK.
4 Department of Population, Family and Reproductive Health, Johns Hopkins University, Baltimore, MD, USA.
5 Poverty Health and Nutrition Division, International Food Policy Research Institute, Washington, DC, USA.