title: Serum alpha1-antitrypsin in children with bronchiolitis.
mesh_terms: D000367:Age Factors; D001982:Bronchial Diseases / Q000097:blood / Q000201:enzymology*; D001996:Bronchopneumonia; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007234:Infant, Premature; D012141:Respiratory Tract Infections / Q000097:blood / Q000201:enzymology; D019896:alpha 1-Antitrypsin Deficiency