Department of Nutrition and Department of Medicine, University of North Carolina Chapel Hill, Chapel Hill, NC, USA. Division of Pulmonary Medicine and Anderson Center for Health Systems Excellence, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. School of Nursing, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. Division of Pediatric Endocrinology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA. Children's Endocrinology and Diabetes, WakeMed Children's Hospital, Raleigh, NC, USA. Department of Nutrition, University of North Carolina Chapel Hill, Chapel Hill, NC, USA. Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO, USA. Northwest Lipid Metabolism and Diabetes Research Laboratories, University of Washington, Seattle, WA, USA. Department of Research, Nemours Children's Clinic, Jacksonville, FL, USA.