1. Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
2. Respiratory Unit, IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
3. Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
4. Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Respiratory Department, Milan, Italy
5. Emergency Medicine Unit, IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy