title: A study of alpha1 antitrypsin deficiency in pulmonary emphysema.
mesh_terms: D000293:Adolescent; D000328:Adult; D001991:Bronchitis / Q000150:complications; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008875:Middle Aged; D011656:Pulmonary Emphysema / Q000209:etiology*; D011660:Pulmonary Heart Disease / Q000150:complications; D019896:alpha 1-Antitrypsin Deficiency