1 Alma Mater Studiorum, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy; IRCCS Azienda Ospedaliero Universitaria di Bologna, Respiratory and Critical Care Unit- Bologna, Italy.
2 IRCCS Azienda Ospedaliero Universitaria di Bologna, Respiratory and Critical Care Unit- Bologna, Italy.
3 Alma Mater Studiorum, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy; IRCCS Azienda Ospedaliero Universitaria di Bologna, Respiratory and Critical Care Unit- Bologna, Italy. Electronic address: [email protected].