1. Division of Chronic Disease Research Across the Lifecourse (CoRAL), Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute , Boston, Massachusetts, USA
2. Institute for Health Research, Kaiser Permanente Colorado , Aurora, Colorado, USA
3. Department of Clinical and Health Psychology, University of Florida , Gainesville, Florida, USA
4. Department of Pediatrics, Vanderbilt University Medical Center , Nashville, Tennessee, USA
5. MITRE Corporation , McLean, Virginia, USA
6. Division of Nutrition, Physical Activity, and Obesity, Centers for Disease Control and Prevention , Atlanta, Georgia, USA