title: Decrease of lung function over time in chronic obstructive lung-disease.
mesh_terms: D000328:Adult; D001991:Bronchitis / Q000503:physiopathology*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008168:Lung / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D013997:Time Factors