1. Department of Cardiology and Angiology Hannover Medical School Hannover Germany
2. Institute of Diagnostic and Interventional Radiology Hannover Medical School Hannover Germany
3. Department of Cardiology Paracelsus Medical University, General Hospital Nuernberg Nuernberg Germany
4. Division of Cardiology, Pulmonology, and Vascular Medicine, Medical Faculty University Duesseldorf Germany
5. Department of Cardiology, Pulmonology, and Vascular Medicine University of Heidelberg Heidelberg Germany