1. Cardiovascular Department, ASST Papa Giovanni XXIII, Bergamo, Italy
2. School of Medicine and Surgery, Milano Bicocca University, Milan, Italy
3. Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy
4. Department of Medicine and Surgery, University of Milano Bicocca, Milan, Italy
5. Cardiovascular Department, ASST Papa Giovanni XXIII, Bergamo, Italy; Department of Medicine and Surgery, University of Milano Bicocca, Milan, Italy