1. Cardiology Unit, University of Campania ‘Luigi Vanvitelli’ – Monaldi Hospital, Naples, Italy
2. Cardiology Unit, San Donato Hospital, Arezzo (FI), Italy
3. Cardiology Unit, Padre A Micone Hospital ASL3, Genoa, italy
4. Cardiology Unit, Ospedale Civico, Palermo, Italy
5. Cardiology Department, Polyclinic Hospital of Bari, Italy
6. Cardiology Department, Brotzu Hospital, Cagliari, Italy
7. Cardiology unit, Papardo Hospital, Messina, Italy
8. Cardiology Department, Maria Vittoria Hospital, Turin, Italy
9. Cardiology Unit, Umberto I Hospital, Nocera Inferiore (SA), Italy