title: Tracheobronchial clearance and chronic obstructive lung disease.
mesh_terms: D000336:Aerosols; D000368:Aged; D001980:Bronchi / Q000503:physiopathology*; D001991:Bronchitis / Q000503:physiopathology*; D002908:Chronic Disease; D002923:Cilia / Q000503:physiopathology*; D003371:Cough; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011138:Polytetrafluoroethylene; D011656:Pulmonary Emphysema / Q000503:physiopathology; D011877:Radionuclide Imaging; D012737:Sex Factors; D013147:Spirometry; D013667:Technetium; D014132:Trachea / Q000503:physiopathology*; D014361:Trypsin Inhibitors / Q000097:blood
chemical_list: D000336:Aerosols; D014361:Trypsin Inhibitors; D013667:Technetium; D011138:Polytetrafluoroethylene