1 Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Respiratory Unit and Cystic Fibrosis Adult Center, Milan, Italy; University of Milan, Department of Pathophysiology and Transplantation, Milan, Italy.
2 Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Respiratory Unit and Cystic Fibrosis Adult Center, Milan, Italy; University of Milan, Department of Pathophysiology and Transplantation, Milan, Italy. Electronic address: stefano.aliberti@unimi.it.
3 Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Respiratory Unit and Cystic Fibrosis Adult Center, Milan, Italy; Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Dipartimento Professioni Sanitarie, Milan, Italy.