1. Endocrinology and Diabetes Unit (L.J.M.H., B.H., M.F., M.Z., B.A., S.H.), Department of Internal Medicine I, University Hospital of Wuerzburg, University of Wuerzburg, D-97080 Wuerzburg, Germany
2. Department of Endocrinology, Diabetes, and Rheumatology (H.S.W.), University Hospital Duesseldorf, D-40225 Duesseldorf, Germany
3. Clinical Endocrinology (M.Q.), Charité Campus Mitte, Charité University Medicine Berlin, D-10117 Berlin, Germany
4. Department of Endocrinology (N.R.), Medizinische Klinik-Innenstadt, University Hospital Munich, D-80336 Munich, Germany