1 Heart and Lung Center, Helsinki University Hospital, University of Helsinki, Helsinki, Finland.
2 Department of Surgery, Oulu University Hospital and University of Oulu, Oulu, Finland.
3 Department of Medicine, South-Karelia Central Hospital, University of Helsinki, Lappeenranta, Finland.
4 Department of Molecular Medicine and Surgery, Department of Cardiac Surgery, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.
5 Division of Cardiac Surgery, Cardio-thoracic and Vascular Department, Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy.
6 Division of Cardiac Surgery, Ospedale Policlinico San Martino, University of Genoa, Genoa, Italy.
7 Department of Cardiothoracic Sciences, Monaldi Hospital, University of Campania "Luigi Vanvitelli", Naples, Italy.
8 Cardiovascular Department, IRCCS Centro Cardiologico Monzino, Milan, Italy.
9 Division of Cardiac Surgery, University of Verona Medical School, Verona, Italy.
10 Global Health Department, Italian Health Institute, Rome, Italy.
11 Department of Cardiovascular Sciences, Clinical Sciences Wing, University of Leicester, Glenfield Hospital, Leicester, United Kingdom.