title: The single-breath distribution index (VA'-VA) in chronic bronchitis and emphysema.
mesh_terms: D000328:Adult; D000368:Aged; D001991:Bronchitis / Q000503:physiopathology; D002908:Chronic Disease; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000032:analysis; D011656:Pulmonary Emphysema / Q000503:physiopathology; D012907:Smoking; D013147:Spirometry / Q000379:methods*
chemical_list: D010100:Oxygen