title: Age dependence of serum angiotensin-converting enzyme activity.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D003550:Cystic Fibrosis / Q000201:enzymology; D006105:Granulomatous Disease, Chronic / Q000201:enzymology; D006801:Humans; D007703:Peptidyl-Dipeptidase A / Q000097:blood*
chemical_list: D007703:Peptidyl-Dipeptidase A