[1] Univ Cattolica Sacro Cuore, Dept Cardiovasc & Pulm Sci, I-00168 Rome, Italy
[2] Natl & Kapodistrian Univ, Hippokrat Hosp, Dept Cardiol 1, Athens 11527, Greece
[3] Fdn Policlin Univ A Gemelli IRCCS, Dept Cardiovasc Med, I-00168 Rome, Italy
[4] Cardiothorac Dept, Cardiol Unit, Azienda Osped Univ St Maria Misericordia, I-33100 Udine, Italy