[1] Sapienza Univ Rome, Dept Clin Internal Anesthesiol & Cardiovasc Sci, Rome, Italy
[2] AOU Citta Salute & Sci Torino, Turin, Italy
[3] Asst Grande Osped Metropolitano Niguard A, Intens Cardiac Care Unit, Milan, Italy
[4] Asst Grande Osped Metropolitano Niguard A, Gasperis Cardio Ctr, Milan, Italy
[5] Univ Siena, Cardiovasc Dis Unit, Le Scotte Hosp, Siena, Italy
[6] IVREA Hosp, Ivrea, Italy
[7] AOU Maggiore Della Carit, Novara, Italy
[8] St Andrea Vercelli Hosp, Vercelli, Italy
[9] Madre Giuseppina Vannini Hosp, Rome, Italy
[10] Univ Penn, Philapdelphia, PA USA
[11] Univ Milan, Dept Clin Sci & Community Hlth, Milan, Italy
[12] Univ Piemonte Orientale, Novara, Italy
[13] Luigi Sacco Hosp Polo Univ, Dept Cardiol, Milan, Italy