1. Respiratory Diseases and Lung Transplantation Unit, Department of Medical and Surgical Sciences & Neuro-Sciences, University of Siena, 53100 Siena, Italy
2. Department of Medical and Surgical Sciences, University of Foggia, 71122 Foggia, Italy
3. Institute of Respiratory Diseases, Policlinico Riuniti of Foggia, 71122 Foggia, Italy
4. Inflammatory Diseases, Biomedical Research Institute Sant Pau (IIB Sant Pau), 08041 Barcelona, Spain
5. Diagnostic and Interventional Bronchoscopy Unit, Cardio-Thoracic and Vascular Department, University Hospital of Siena (Azienda Ospedaliera Universitaria Senese—AOUS), 53100 Siena, Italy
6. Respiratory Department, Hospital de la Santa Creu i Sant Pau, Sant Pau Biomedical Research Institute (IIB-Sant Pau), 08041 Barcelona, Spain