1. Cardiothoracic Department, Azienda Sanitaria Universitaria Friuli Centrale S. Maria della Misericordia University Hospital of Udine Udine Italy
2. Division of Cardiac Surgery, S. Orsola University Hospital ALMA Mater Studiorum University of Bologna, IRCCS Bologna Bologna Italy
3. Division of Cardiac Surgery, IRCCS San Raffaele Hospital Vita‐Salute San Raffaele University Milan Italy
4. Cardiothoracic Department San Camillo Forlanini Hospital Rome Italy
5. Cardiothoracic Department Papa Giovanni XXII Hospital of Bergamo Bergamo Italy