[1] Univ Naples Federico II, Fac Med & Surg, Dept Cardiovasc & Internal Med, Naples, Italy
[2] St Anna Hosp, Dept Cardiol, Catanzaro, Italy
[3] Garibaldi Nesima Hosp, Div Cardiol, Catania, Italy
[4] Univ Roma La Sapienza, Scuola Speciali Med del Lavoro, Rome, Italy
[5] Nuovo Ospedale Civil, Cardiol Unit, Sassuolo, Italy
[6] Cardiovascular Epidemiol Unit, Cardiol Dept AUSL, Bologna, Italy
[7] AOU Federico II, Direzione Sanitar, Naples, Italy
[8] San Filippo Neri Hosp, Cardio Dept, Rome, Italy