1. Endocrine Research Unit 9 (J.D.V., M.C., D.E., R.P., K.M.), General Clinical Research Center, Mayo Medical and Graduate Schools of Medicine, Mayo Clinic, Rochester, Minnesota 55905
2. Division of Endocrinology and Metabolism (L.S.F.), Department of Internal Medicine, School of Medicine, University of Virginia, Charlottesville, Virginia 22908
3. Endocrine Division, Department of Medicine (C.Y.B.), Tulane University Health Sciences Center, New Orleans, Louisiana 70112