1. Neuroendocrine (M.M., H.C., K.K.M., A.K.), Boston, Massachusetts 02114;
2. Pediatric Endocrine (M.M.), Boston, Massachusetts 02114;
3. Division of Adolescent Medicine (D.K.K., D.S.), Department of Pediatrics, The Hospital for Sick Children and University of Toronto, Toronto, Canada M5G 2L3
4. Units and Division of Adolescent and Young Adult Medicine (K.B.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114;