1. School of Medicine and Surgery, University of Milan-Bicocca, 20126 Milan, Italy
2. Section of Cardiovascular Disease, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, 25133 Brescia, Italy
3. Cardiology 1 Unit, ASST Papa Giovanni XXIII, 24121 Bergamo, Italy
4. Cardiac Surgery Unit, ASST Papa Giovanni XXIII, 24121 Bergamo, Italy