Affiliation: | 1. Division of Nutrition, Physical Activity, and Obesity, Centers for Disease Control and Prevention, Atlanta, Georgia, USA;2. Children's Nutrition Research Center, Baylor College of Medicine, Houston, Texas, USA;3. Department of Pediatrics, MassGeneral Hospital for Children, Boston, Massachusetts, USA;4. National Center for Health Statistics, Centers for Disease Control and Prevention, Hyattsville, Maryland, USA |