1. Cardiology Department, Papa Giovanni XXIII Hospital, 24127 Bergamo, Italy
2. Cardiology Department, Grande Ospedale Metropolitano, 89129 Reggio Calabria, Italy
3. Cardiology Division, Valduce Hospital, 22100 Como, Italy
4. Cardiology Department, San Filippo Neri Hospital, ASL Roma 1, 00135 Rome, Italy
5. Department of Cardiology, General Regional Hospital “F. Miulli”, 70021 Bari, Italy
6. Cardiology Department De Gasperis Cardio Center, Niguarda Hospital, 20162 Milan, Italy
7. Cardiology Department, Garibaldi Nesima Hospital, 95122 Catania, Italy