1. Neuroendocrine Unit; Massachusetts General Hospital and Harvard Medical School; Boston Massachusetts
2. Division of Adolescent Medicine, Department of Pediatrics; Hospital for Sick Children and University of Toronto; Toronto Ontario Canada
3. Cambridge Eating Disorders Center; Cambridge Massachusetts
4. Biostatistics Center; Massachusetts General Hospital; Boston Massachusetts
5. Pediatric Endocrine Unit; Massachusetts General Hospital for Children and Harvard Medical School; Boston Massachusetts