1. Division of Endocrinology and Diabetology, Department of Medicine II, Medical Center, University of Freiburg, Faculty of Medicine University of Freiburg Freiburg Germany
2. Hospital for Internal Medicine Kantonsspital Frauenfeld Frauenfeld Switzerland
3. Hospital for Internal Medicine IV University of Tuebingen Tuebingen Germany
4. Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich University of Tuebingen (IDM) Tuebingen Germany
5. Joint Practice Anderten‐Krok & Partner Hildesheim Germany
6. Sanofi‐Aventis Deutschland GmbH Berlin Germany
7. Department of Internal Medicine III Sophien‐ and Hufeland‐Hospital Weimar Germany
8. Medical Clinic I Evang. Bethesda‐Hospital Duisburg Duisburg Germany