1. Division of Cardiac Surgery, University of Padova, Padova, Italy;6. Division of Cardiology, University of Padova, Padova, Italy;2. Division of Cardiac Surgery, San Camillo Hospital, Rome, Italy;3. Centro Cardiologico Monzino, University of Milan, Milan, Italy;4. Division of Cardiac Surgery, San Matteo Hospital, University of Pavia, Pavia, Italy;5. Division of Cardiac Surgery, Hesperia Hospital, Modena, Italy