1. Department of Diagnostic and Interventional Radiology, University Hospital Ulm, Ulm, Germany
2. Department of Diagnostic and Interventional Radiology, University Hospital Wuerzburg, Wuerzburg, Germany
3. Department of Medicine I, Division of Cardiology, University Hospital Wuerzburg, Wuerzburg, Germany
4. Heart Clinic Ulm, Ulm, Germany
5. Department of Medicine II, Cardiology, University Hospital Ulm, Ulm, Germany
6. Department of Cardiac, Thoracic and Vascular Surgery, University Hospital Ulm, Ulm, Germany
7. Department of Medicine I, Hospital Centre Vest, Recklinghausen, Germany