1. Comprehensive Heart Failure Centre, University Hospital and University of Würzburg, Germany
2. Institute of Clinical Epidemiology and Biometry, University of Würzburg, Germany
3. Department of Medicine I, University Hospital Würzburg, Germany
4. Department of Cardiovascular Medicine, National Heart and Lung Institute, Imperial College London, UK
5. Department of Cardiovascular Surgery, University Hospital Würzburg, Germany
6. Department of Medicine, Klinik Kitzinger Land, Kitzingen, Germany
7. Clinical Trial Centre, University Hospital Würzburg, Germany