1. O.U. Cardiology-ICCU, P. Borsellino Hospital, ASP Trapani, 91025 Marsala, Italy
2. O.U. Interventional Cardiology, Bianchi Melacrino Morelli Hospital, 89124 Reggio Calabria, Italy
3. Internal Medicine and Stroke Care Ward, Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, University of Palermo, 90141 Palermo, Italy
4. Cardiology Division, San Filippo Neri Hospital, 00135 Rome, Italy
5. Department of Experimental and Clinical Medicine, Careggi University Hospital, University of Florence, 50121 Firenze, Italy
6. O.U. Cardiology, Garibaldi-Nesima Hospital, ARNAS Garibaldi, 95123 Catania, Italy
7. O.U. Cardiology, Santo Spirito Hospital, 15033 Casale Monferrato, Italy
8. Heart Diagnostics Division, A.O. S. Camillo-Forlanini, 00152 Rome, Italy
9. Cardiology Department, Mauriziano Umberto I Hospital, 10128 Turin, Italy