1. Hamburg University Heart Center, Hamburg, Germany
2. National Center of Global Health, Istituto Superiore di Sanità, Rome, Italy
3. Heart Center, Turku University Hospital, University of Turku, Turku, Finland
4. Division of Cardiovascular Surgery, Verona University Hospital, Verona, Italy
5. Department of Molecular Medicine and Surgery, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
6. Department of Cardiac Surgery, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
7. Department of Cardiovascular Sciences, Cardiac Surgery Unit, S. Camillo-Forlanini Hospital, Rome, Italy
8. Division of Cardiac Surgery, Ospedali Riuniti, Trieste, Italy
9. Department of Cardiothoracic Sciences, University of Campania, Naples, Italy
10. Cardiovascular Center, Paracelsus Medical University, Nuremberg, Germany
11. Città di Lecce Hospital GVM Care&Research, Lecce, Italy
12. Centro Clinico-Diagnostico “G.B. Morgagni”, Centro Cuore, Pedara, Italy
13. Department of Cardiac Surgery, St. Anna Hospital, Catanzaro, Italy
14. Division of Cardiac Surgery, University of Genoa, Genoa, Italy
15. Division of Cardiac Surgery, University of Parma, Parma, Italy
16. Department of Cardiac Surgery, Centro Cardiologico-Fondazione Monzino IRCCS, University of Milan, Milan, Italy
17. Division of Cardiothoracic and Vascular Surgery, Pontchaillou University Hospital, Rennes, France
18. Department of Surgery, Oulu University Hospital and University of Oulu, Oulu, Finland
19. Department of Cardiovascular Sciences, Clinical Sciences Wing, University of Leicester, Glenfield Hospital, Leicester, UK
20. Division of Cardiothoracic and Vascular Surgery, Robert Debré University Hospital, Reims, France
21. Department of Thoracic and Cardiovascular Surgery, University Hospital Jean Minjoz, Besançon, France
22. Department of Surgery, University of Turku, Turku, Finland