1. Department of Endocrinology, Diabetes and Metabolism, University of Lübeck, Lübeck, Germany
2. Division of Endocrinology and Diabetology, Department of Medicine II, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, 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. Institute for Biometrics and Epidemiology, German Diabetes Center, Leibniz Institute for Diabetes Research at Heinrich Heine University, Düsseldorf, Germany
6. Section of Endocrinology and Diabetology, RWTH Aachen University, Aachen, Germany
7. Department of Internal Medicine 1, Goethe University Hospital, Frankfurt, Germany
8. Division of Endocrinology and Diabetology, Medical University of Graz, Graz, Austria
9. Department of General Internal Medicine, Endocrinology and Diabetology, Helios Clinic Schwerin, Schwerin, Germany
10. Specialized Diabetes Practice, Rosenheim, Germany
11. Diabetes Center Karlsburg, Karlsburg, Germany