title: Alpha 1 antitrypsin deficiency in chronic obstructive pulmonary disease (COPD).
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000097:blood*; D008297:Male; D008875:Middle Aged; D019896:alpha 1-Antitrypsin Deficiency