1. Institute of Epidemiology and Medical Biometry, ZIBMT, Ulm University, Ulm, Germany.
2. German Centre for Diabetes Research (DZD), München-Neuherberg, Germany.
3. Specialized Diabetes Practice, Essen, Germany.
4. Department of Internal Medicine, University of Erlangen, Erlangen, Germany.
5. Department of Diabetes, Endocrinology, Nutritional Medicine and Metabolism, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
6. Landesklinikum Korneuburg Stockerau, Korneuburg Stockerau, Austria.
7. Centre for Children and Adolescents “AUF DER BULT,” Hannover, Germany.
8. Department of General Internal Medicine, Endocrinology and Diabetology, Helios Clinic Schwerin, Schwerin, Germany.
9. Institute for Pharmacology and Preventive Medicine, Cloppenburg, Germany.
10. Institute for Endocrinology & Diabetes, University of Lübeck, Lübeck, Germany.
11. Department of Internal Medicine 1, Endocrinology & Diabetes, University of Lübeck, Lübeck, Germany.