1. Institute of Epidemiology and Medical Biometry, ZIBMT, German Center for Diabetes Research (DZD), University of Ulm, Ulm, Germany
2. Centre for Paediatrics, Medical Clinic Leverkusen, Leverkusen, Germany
3. Diabetes Center, Clinic Tettnang, Tettnang, Germany
4. DZFO, Diabetes Centre Forchheim, Forchheim, Germany
5. Center for Internal Medicine, Endocrinology and Diabetology, Schwerin Hospital, Schwerin, Germany
6. Diabetes Center, Augsburg Clinical Center, Augsburg, Germany
7. Department of Internal Medicine I, Medical University of Innsbruck, Innsbruck, Austria
8. Division of Sports and Rehabilitation Medicine, Department of Internal Medicine II, University of Ulm, Ulm, Germany