1. Department of Cardiology, Technische Universität Dresden, (Campus Chemnitz) , Klinikum Chemnitz, Flemmingstrasse 2, 09116 Chemnitz , Germany
2. Department of Cardiology and Intensive Care Medicine, Mid-German Heart Center, University Hospital, Martin-Luther-University Halle-Wittenberg , 06120 Halle , Germany
3. Department of Internal Medicine and Cardiology, Herzzentrum Dresden, Technische Universitaet Dresden , Dresden , Germany
4. Department of Cardiology, Heart Centre Trier, Barmherzige Brüder Hospital , 54292 Trier , Germany
5. Department of Cardiology, Medical University of Bialystok , 15-276 Bialystok , Poland
6. Department of Cardiology and De Gasperis Cardio Center, ASST Grande Ospedale Metropolitano Niguarda , 20162 Milano , Italy
7. Department of Cardiology, Angiology and Intensive Care, University Hospital RWTH Aachen , 52074 Aachen , Germany