1. Department for Cardiology and Pulmonology; Georg-August University; Göttingen Germany
2. German Center for Cardiovascular Research (DZHK); Göttingen Germany
3. Department for Heart and Transplantation Surgery; Heart Center; Bad Oeynhausen Germany
4. Department for Thoracic and Heart Surgery; Medical University of Hannover; Hannover Germany
5. Department for Internal Medicine III, Cardiology, Angiology, and Intensive Care Medicine; University Medical Center; Kiel Germany