1. Division of Human Genetics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania;
2. Department of Biostatistics and Epidemiology, University of Pennsylvania, Philadelphia, Pennsylvania;
3. Center for Applied Genomics, Abramson Research Center, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania;
4. Behavioral Health Center and Department of Child and Adolescent Psychiatry, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania;
5. Center for Weight and Eating Disorders, Department of Psychiatry, University of Pennsylvania, Philadelphia, Pennsylvania;
6. Department of Pediatrics, University of Pennsylvania, Philadelphia, Pennsylvania.