1. Division of Endocrinology and Metabolism (J.D.V.), Department of Internal Medicine, Mayo Medical and Graduate Schools of Medicine, General Clinical Research Center, Mayo Clinic, Rochester, Minnesota 55905;
2. Department of Pediatrics (J.N.R.), State University of New York at Buffalo, Buffalo, New York 14214-3000;
3. Departments of Pediatrics and Internal Medicine (E.J.R., A.D.R.), General Clinical Research Center, University of Virginia School of Medicine, Charlottesville, Virginia 22903;
4. Pennington Biomedical Research Center (J.C.L.), Baton Rouge, Louisiana 70808;
5. Division of Endocrinology (M.S.-M.), Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas 77555;
6. Department of Pediatrics (N.M.), Nemours Children’s Clinic, Jacksonville, Florida 32207;
7. Division of Endocrinology and Metabolism (C.Y.B.), Department of Internal Medicine, Tulane University Medical Center, New Orleans, Louisiana 70112