1Department of Pulmonary Medicine, University Hospital of Patras, University of Patras, 26500 Patras, Greece 2Department of Thoracic Medicine, University General Hospital, Medical School, University of Crete, 71110 Heraklion, Greece 3Department of Pulmonary Medicine, Hospital Universitari Vall d’Hebron, 08036 Barcelona, Spain 4Department of Respiratory Medicine, Università degli Studi di Milano...