1. Department of Anesthesia and Intensive Care, ASST Santi Paolo e Carlo, San Paolo University Hospital Milan, Milan, Italy
2. Division of Respiratory Diseases, Ospedale Luigi Sacco, Polo Universitario, ASST Fatebenefratelli-Sacco, Milan, Italy
3. Department of Biomedical and Clinical Sciences (DIBIC), University of Milan, Milan, Italy
4. Department of Health Sciences, University of Milan, Italy
5. Coordinated Research Center on Respiratory Failure, University of Milan, Italy