1. Division of Primary Care Pediatrics, Department of Pediatrics, Duke Center for Childhood Obesity Research, School of Medicine, Duke University, Durham, North Carolina;
2. Division of Neonatal-Perinatal Medicine, Department of Pediatrics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina;
3. Department of Neurology, Harvard Medical School, Harvard University and Neuroepidemiology Unit, and Department of Neurology, Boston Children’s Hospital, Boston, Massachusetts; and
4. Department of Pediatrics, Boston Medical Center, Boston University, Boston, Massachusetts