title: Homozygous and heterozygous alpha-1-antitrypsin deficiency: prevalence in pulmonary emphysema.
mesh_terms: D006579:Heterozygote; D006720:Homozygote; D006801:Humans; D010641:Phenotype; D011656:Pulmonary Emphysema / Q000235:genetics*; D019896:alpha 1-Antitrypsin Deficiency