1. Department of Medical Statistics, University Medical Center Göttingen , Humboldtallee 32, 37073 Göttingen, Germany
2. DZHK (German Center for Cardiovascular Research) , Partner Site Göttingen, Robert-Koch str. 40, 37075 Göttingen, Germany
3. Department of Cardiology, Sana Klinikum Offenbach , Starkenburgring 66, 63069 Offenbach am Main, Germany
4. German Society for Thoracic and Cardiovascular Surgery, Langenbeck-Virchow-Haus , Luisenstraße 58/59, 10117 Berlin, Germany
5. Department for Cardiac and Pediatric Cardiac Surgery, Heart Center Duisburg, EVKLN , Gerrickstr. 21, 47137 Duisburg , Germany
6. Department of Cardiology, Robert-Bosch-Krankenhaus , Auerbachstraße 110, 70376 Stuttgart, Germany
7. Clinic for Thoracic and Cardiovascular Surgery, Heart and Diabetes Center Northrhine-Westphalia , Georgstr 11, 32545 Bad Oeynhausen, Germany
8. Goethe University Frankfurt, Department of Medicine, Institute of Biostatistics and Mathematical Modelling , Theodor-Stern-Kai 7, 60590 Frankfurt Main, Germany
9. DZHK (German Centre for Cardiovascular Research) , Partner Site Rhine/Main, Theodor-Stern-Kai 7, 60590 Frankfurt Main, Germany
10. Department of Cardiology, St.-Johannes-Hospital Dortmund , Johannesstrasse 9-17, 44137 Dortmund, Germany
11. Department of Cardiothoracic Surgery, University Hospital Frankfurt , Theodor-Stern-Kai 7, 60590 Frankfurt, Germany
12. Medical Faculty of the Albert-Ludwigs-University Freiburg, University Hospital Freiburg , Hugstetterstr. 55, 79106 Freiburg, Germany
13. Department of Cardiovascular Surgery, Heart Centre Freiburg University , Freiburg , Germany
14. Department of Cardiology and Angiology, University Hospital Gießen , Klinikstr. 33, 35392 Gießen, Germany
15. Department of Cardiology, Kerckhoff Heart and Thorax Center , Benekestraße 2-8, D-61231 Bad Nauheim , Germany
16. CTU Bern, University of Bern , Mittelstrasse 43, 3012 Bern, Switzerland
17. Department of Cardiology, Inselspital, Bern University Hospital, University of Bern , 3010 Bern, Switzerland
18. Clinic for Cardiothoracic and Vascular Surgery/Heart Center, University Medical Center Göttingen , Robert-Koch Str. 40, 37075 Göttingen, Germany
19. Clinic for Cardiology and Pulmonology, Heart Center, University Medical Center Göttingen , Robert-Koch Str. 40, 37075 Göttingen, Germany
20. Department of Cardiac and Thoracic Vascular Surgery, University Heart Center Lübeck , Ratzeburger Allee 160, 23538 Lübeck, Germany
21. DZHK (German Centre for Cardiovascular Research) , partner site Hamburg/Kiel/Lübeck, Lübeck , Germany
22. Department of Cardiology, University Heart Center Lübeck , Ratzeburger Allee 160, 23538 Lübeck, Germany