1. Division of Endocrinology, Diabetes and Metabolism (J.T., H.W.D., M.H.T., D.D.), Department of Medicine, University of Cincinnati, Cincinnati, Ohio 45267
2. Division of Gerontology (R.L.P.), University of Maryland School of Medicine, and Baltimore VA Medical Center Geriatric Research, Education and Clinical Center, Baltimore, Maryland 21201
3. Medizinische Klinik–Innenstadt (M.B.), Ludwig-Maximilians-Universität, 80539 Munich, Germany
4. Institute for Obesity and Diabetes (M.H.T.), Helmholtz Center Munich and Division of Metabolic Diseases, Department of Medicine, Technical University Munich, 85748 Munich, Germany
5. Cincinnati VA Medical Center (D.D.), Cincinnati, Ohio 45220