1. Neuroendocrine Unit (A.T.F., A.T., K.K.M., N.M., E.M., M.L.B., M.M., A.K.), Boston, Massachusetts 02114;
2. Beth Israel Deaconess Medical Center (L.K., M.L.B.), Boston, Massachusetts 02215
3. Biostatistics Center (H.L.), Boston, Massachusetts 02114;
4. Division of Adolescent and Young Adult Medicine (M.A.G.), Boston, Massachusetts 02114;
5. Massachusetts General Hospital for Children, and Pediatric Endocrine Unit (M.M.), Massachusetts General Hospital for Children and Harvard Medical School, Boston, Massachusetts 02114;