1 Molecular Pathology Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy.
2 Interventional Pulmonary Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy.
3 Respiratory Disease Unit, Department of Medical and Surgical Sciences, University of Modena and Reggio Emilia, University Hospital of Modena, Modena, Italy.