1 Division of Respiratory Diseases, Department of Medicine, Maggiore della Carità University Hospital, Novara, Italy - filippo.patrucco@maggioreosp.novara.it.
2 Department of Translational Medicine, University of Eastern Piedmont, Novara, Italy - filippo.patrucco@maggioreosp.novara.it.
3 Unit of Pneumology, A.S.L. Genova3, Villa Scassi Hospital, Genoa, Italy.
4 Unit U of Pneumology, Department of Medicine, A.S.L. Vercelli, Vercelli, Italy.
5 ProMISE Department, University of Palermo, Palermo, Italy.
6 Unit U of Pneumology, Department of Cardiovascular and Thoracic Medicine, Città della Salute e della Scienza, University of Turin, Turin, Italy.
7 Department of Medical Sciences, University of Turin, Turin, Italy.