1. Department of Cardiovascular Surgery, University Heart & Vascular Center Hamburg University Hospital Eppendorf Hamburg Germany
2. German Center for Cardiovascular Research (DZHK) Partner Site Hamburg/Kiel/Lübeck Hamburg Germany
3. Department of Cardiology & Critical Care Medicine Asklepios Klinik St. Georg Hamburg Germany
4. Department of Cardiac Surgery Kerckhoff‐Klinik Bad Nauheim Germany
5. Division of Electrophysiological Surgery Johanniter‐Hospital Duisburg‐Rheinhausen Duisburg Germany
6. Department of Cardiovascular Surgery Helios Clinic for Heart Surgery Karlsruhe Germany
7. Department of Cardiac Surgery University Heart Center Dresden Dresden Germany
8. Department of Cardiology Heart Center Brandenburg Bernau Neuruppin Germany