1 Department of Internal Medicine IV - Grosshadern, LMU Klinikum, Munich, Germany.
2 Department of Internal Medicine IV, University Hospital, Tübingen.
3 Institute for Diabetes Research and Metabolic Diseases (IDM) of the Helmholtz Center Munich at the University of Tübingen, German Center for Diabetes Research (DZD e. V.) Germany.
4 Center for Endocrinology, Diabetology and Preventive Medicine, University Hospital Cologne, Cologne, Germany.
5 Department of Internal Medicine I - Cardiology, Angiology and Internal Intensive Care Medicine, University Hospital Aachen, Aachen, Germany.
6 Endocrinologikum Hamburg, Hamburg, Germany.
7 Department of Internal Medicine - Division of Cardiology, LKH University Hospital Graz, Medical University Graz, Austria.