[1] Marche Polytech Univ Ancona, Osped Riuniti Univ Hosp, Cardiol & Arrhythmol Clin, Ancona, Italy
[2] Cardinale G Pan Hosp, Cardiol Unit, Tricase, Italy
[3] Hosp Maggiore Carita, Div Cardiol, Novara, Italy
[4] Univ Hosp Policlin S Orsola Malpighi, Inst Cardiol, Bologna, Italy
[5] Federico II Univ Hosp, Dept Cardiol, Naples, Italy
[6] Univ Modena & Reggio Emilia, Dept Cardiol, Modena, Italy