Precipitous fall of the forced expiratory volume.
D000328:Adult; D001991:Bronchitis / Q000503:physiopathology; D002908:Chronic Disease; D006801:Humans; D008171:Lung Diseases / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D012129:Respiratory Function Tests; D013147:Spirometry