1. Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, CO 80523
2. Division of Nutrition and Physical Activity, Centers for Disease Control and Prevention (NCCDPHP), Atlanta, GA 30341
3. California Department of Health Services, Maternal and Child Health Branch, Sacramento CA 95815
4. Division of Reproductive Health, Centers for Disease Control and Prevention (NCCDPHP), Atlanta, GA 30341