title: Alpha-1 antitrypsin enzyme deficiency in bronchial asthma: a preliminary study.
mesh_terms: D000293:Adolescent; D000328:Adult; D001249:Asthma / Q000201:enzymology*; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D012907:Smoking; D019896:alpha 1-Antitrypsin Deficiency