title: [Elastase activity of the sputum and the functional activity of serum alpha 1-antitrypsin in patients with chronic obstructive pulmonary disease].
authors.forename: S W
authors.initials: SW
authors.lastname: Zhou
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000097:blood / Q000201:enzymology*; D008297:Male; D008875:Middle Aged; D010196:Pancreatic Elastase / Q000378:metabolism*; D013183:Sputum / Q000201:enzymology*; D000515:alpha 1-Antitrypsin / Q000032:analysis*
chemical_list: D000515:alpha 1-Antitrypsin; D010196:Pancreatic Elastase