2 Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy - [email protected].
3 Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
4 Department of Health Sciences, University of Milan, Milan, Italy.
5 Respiratory Unit, ASST Santi Paolo e Carlo, Milan, Italy.
6 Department of Anesthesia and Intensive Care, ASST Santi Paolo e Carlo, Milan, Italy.
7 Unit of Clinical Epidemiology and Medical Statistics, Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy.
8 Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy.