1. Former Cardiology Department, San Camillo Forlanini Hospital, 00151 Roma, Italy
2. Cardiology Department, Ferrari Hospital, 87012 Castrovillari, Italy
3. Cardiology Department, Grande Ospedale Metropolitano, GOM, AO Bianchi Melacrino Morelli, 89129 Reggio Calabria, Italy
4. Cardiology Unit, Giovanni Paolo II Hospital, 88046 Lamezia, Italy
5. Cardiology Department, San Filippo Neri Hospital, 00135 Rome, Italy
6. De Gasperis Cardio Center, Niguarda Hospital, 20162 Milan, Italy
7. Cardiology Complex Unit, Garibaldi Nesima Hospital, 95122 Catania, Italy
8. Cardiothoracic Department, Maastricht University, 6211 LK Maastrich, The Netherlands