1. Institute of Nutrition and Food Technology, University of Chile, Macul 5540, Santiago, Chile
2. National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, GA 30341
3. Pan American Health Organization/World Health Organization, Washington, D.C. 20204
4. Food Science and Human Nutrition Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611
5. March of Dimes, University of Florida, Gainesville, FL 32611