1. Obesity Prevention Program, Department of Ambulatory Care and Prevention, Harvard Medical School and Harvard Pilgrim Health Care, Boston, Massachusetts
2. Division of Pediatrics, Children's Hospital Boston, Boston, Massachusetts
3. Harvard Prevention Research Center and
4. Center for Children's Health Innovation, Nemours Health and Prevention Services, Newark, Delaware
5. Department of Nutrition, University of North Carolina, Chapel Hill, North Carolina
6. Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts