1. Department of Internal Medicine, Division of Metabolism, Endocrinology and Diabetes (E.V.D., A.L.B., C.A.J.), Ann Arbor, Michigan 48109
2. Pituitary and Neuroendocrine Center and Department of Neurosurgery (W.F.C., A.L.B.), Ann Arbor, Michigan 48109
3. Department of Biostatistics (M.B.B.), Ann Arbor, Michigan 48109
4. Department of Veterans Affairs Medical Center (A.L.B., C.A.J.), Ann Arbor, Michigan 48105
5. Department of Pharmacology (S.Y.K., R.T.), University of Texas Southwestern Medical Center, Dallas, Texas 75235
6. Department of Pediatrics (V.P.), University of Michigan, Ann Arbor, Michigan 48109