1. Micronutrient Initiative, Ottawa, ON, Canada
2. The World Bank, Washington, DC
3. Center for Study of Nutrition and Health, National Institute of Public Health, Cuernavaca, Mexico
4. National Coordination of the Oportunidades Human Development Program, Secretary of Social Development, Government of Mexico, Mexico City
5. Direction of the Oportunidades Program, National Commission for Social Protection in Health, Secretary of Health, Government of Mexico, Mexico City, Mexico