1. Cardiothoracic Department, Policlinico Riuniti University Hospital, 71100 Foggia, Italy
2. Department of Medical and Surgical Sciences, University of Foggia, 71100 Foggia, Italy
3. Department of Cardiology, A.O.R.N. dei Colli, Monaldi Hospital, University of Campania L. ‘Vanvitelli’, 80133 Naples, Italy
4. Department of Clinical, Anesthesiological and Cardiovascular Sciences, I School of Medicine, Sapienza University of Rome, 00185 Rome, Italy
5. Division of Cardiology, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy