1. Department of Internal Medicine, Cardiology, CVK, Charité University Medicine Berlin, Berlin, Germany
2. Department of Psychology, Philipps Universität Marburg, Marburg, Germany
3. German Centre for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany
4. Department for Biometry & Clinical Epidemiology, CBF, Charité University Medicine Berlin, Berlin, Germany
5. Department for Cardiovascular Diseases, Clinical Centre Niš, University of Niš, Niš, Serbia
6. Department of Cardiology, University Clinical Hospital Center Bezanijska Kosa, Faculty of Medicine, University of Belgrade, Belgrade, Serbia
7. Institute for Cardiovascular Diseases Dedinje, Department of Cardioloy, Belgrade, Serbia
8. Faculty of Medicine, University of Belgrade, Belgrade, Serbia
9. Comprehensive Heart Failure Center, University Hospital Würzburg, Germany
10. Department of Medicine I, University Hospital Würzburg, Germany
11. Department of Psychosomatic Medicine & Psychotherapy, University of Göttingen Medical Centre, Göttingen, Germany
12. German Centre for Cardiovascular Research (DZHK), Partner Site Göttingen, Göttingen, Germany