1. Medical Clinic I, Diabetes Center Vinzentius‐Hospital Landau Germany
2. Institute for Pharmacology and Preventive Medicine Cloppenburg Germany
3. Institute for Epidemiology and Medical Biometry, ZIBMT, University of Ulm Ulm Germany
4. German Center for Diabetes Research (DZD) München‐Neuherberg Germany
5. Bürgerhospital Frankfurt am Main Frankfurt am Main Germany
6. Gastroenterologie, Klinikum Bayreuth Bayreuth Germany
7. Herz‐ und Diabeteszentrum, Klinikum Karlsburg Karlsburg Germany
8. Division of Endocrinology and Diabetology, Department of Medicine II Medical Center, Faculty of Medicine, University of Freiburg Freiburg Germany
9. German Diabetes Foundation Munich Germany
10. Diabetologie im MVZ am Park Ville d'Eu Haan Germany
11. Institute for Endocrinology & Diabetes University of Lübeck Lübeck Germany
12. Kinderkrankenhaus auf der Bult, Diabeteszentrum für Kinder und Jugendliche Hannover Germany
13. 5th Medical Department for Endocrinology, Rheumatology and Acute Geriatrics, Clinic Ottakring Vienna Austria
14. Clinic of Nephrology and Hypertension, Diabetes and Endocrinology Otto‐Von‐Guericke University Magdeburg Magdeburg Germany
15. Division of Nephrology Wuerzburg University Clinic Würzburg Germany