1. Cardiac, Thoracic and Vascular Department; University of Pisa; Pisa Italy
2. Cardiac, Thoracic and Vascular Department; Fondazione IRCCS; Policlinico San Matteo; Pavia Italy
3. Service of Biometry & Statistics; Fondazione IRCCS; Policlinico San Matteo; Pavia Italy
4. Department of Biomedical and Surgical Sciences; Cardiology Section, University of Verona; Verona Italy
5. Division of Cardiology; Fondazione Salvatore Maugeri; IRCCS; Torino Italy
6. GVM Care&Research; FondazioneEttoreSansavini per la RicercaScientifica; Health Science Foundation; Cotignola Italy
7. Division of Cardiology; Fondazione Salvatore Maugeri; IRCCS; Veruno Italy