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