1. Department of Internal Medicine I, Evang. Bethesda‐Hospital Duisburg Duisburg Germany
2. Department of Endocrinology, Diabetology, Hypertension and NutritionUniversity Hospital of Geneva Geneva Switzerland
3. Department of Internal Medicine IVUniversity of Tuebingen Tuebingen Germany
4. Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tuebingen (IDM) Tuebingen Germany
5. Department of Internal Medicine IIISophien‐ and Hufeland‐Hospital Weimar Germany
6. Joint Practice Anderten‐Krok & Partner Hildesheim Germany
7. Sanofi‐Aventis Deutschland GmbH Berlin Germany
8. Division of Endocrinology and Diabetology, Department of Medicine II, Medical Center – University of FreiburgFaculty of Medicine, University of Freiburg Germany