1. Cardiovascular Department, Ospedale Papa Giovanni XXIII, Bergamo, Italy
2. Cardiology Department, Wakayama Medical University, Wakayama, Japan
3. Cardiovascular Department, Ospedale San Giovanni Bosco, Torino, Italy
4. Cardiovascular Imaging Core Laboratory, University Hospital, Case Medical Centre, Cleveland, OH, USA
5. Cardiology Department, Ospedale San Giovanni Evangelista, Tivoli, Italy
6. Cardiothoracic Vascular Department, University Hospital, Bologna, Italy
7. Cardio-Thoracic-Vascular and Transplant Department, A.O.U. “Vittorio Emanuele-Policlinico”, University of Catania, Catania, Italy