1. Division of Adolescent Medicine; Boston Children's Hospital; Boston Massachusetts USA
2. Department of Pediatrics; Harvard Medical School; Boston Massachusetts USA
3. Department of Environmental Health Sciences; University of Michigan School of Public Health; Ann Arbor Michigan USA
4. Department of Social and Behavioral Sciences; Harvard School of Public Health; Boston Massachusetts USA
5. Obesity Prevention Program, Department of Population Medicine; Harvard Medical School and Harvard Pilgrim Health Care Institute; Boston Massachusetts USA
6. Department of Nutrition; Harvard School of Public Health; Boston Massachusetts USA
7. Division of General Pediatrics; Massachusetts General Hospital; Boston Massachusetts USA