1. Center for Child Health Care Studies
2. Department of Ambulatory Care and Prevention, Harvard Pilgrim Health Care and Harvard Medical School, Boston, Massachusetts
3. Division of Nutrition and Physical Activity, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia
4. Department of Human Development and Family Studies and Graduate Program in Nutrition, Pennsylvania State University, University Park, Pennsylvania
5. Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts