1. Department of Surgery, Massachusetts General Hospital, Boston
2. Harvard Medical School, Boston, Massachusetts
3. Department of Surgery, MassGeneral Hospital for Children, Massachusetts General Hospital, Boston
4. Codman Center for Clinical Effectiveness in Surgery, Massachusetts General Hospital, Boston
5. Massachusetts General Hospital Weight Center, Department of Medicine, Division of Endocrinology-Neuroendocrinology, Harvard Medical School, Boston
6. Massachusetts General Hospital Weight Center, Department of Pediatrics, Division of Endocrinology, Harvard Medical School, Boston
7. Stanford University School of Medicine, Stanford, California
8. Departments of Surgery and Pediatric Surgery, Lucille Packard Children’s Hospital, Palo Alto, California