1. From the Corporación Ecuatoriana de Biotecnología, Quito, Ecuador (AR, BE, and FS); the Instituto de Ciencia y Tecnología, Ministerio de Salud Pública, Quito, Ecuador (AR and GG); the Center for International Health and Development, Boston University School of Public Health, Boston, MA (DHH); the Tufts University Gerald J and Dorothy R Friedman School of Nutrition Science and Policy, Medford, MA