1 Cardiology Unit, Department for the Treatment and Study of Cardiothoracic, Diseases and Cardiothoracic Transplantation IRCCS, - ISMETT (Istituto Mediterraneo per i Trapianti e Terapie ad alta specializzazione), via Tricomi 5, 90127 Palermo, Italy. Electronic address: gromano@ismett.edu.
2 Cardiology Unit, Department for the Treatment and Study of Cardiothoracic, Diseases and Cardiothoracic Transplantation IRCCS, - ISMETT (Istituto Mediterraneo per i Trapianti e Terapie ad alta specializzazione), via Tricomi 5, 90127 Palermo, Italy.