title: Letter: Alpha 1-antitrypsin null gene (pi-).
mesh_terms: D000328:Adult; D001789:Blood Group Antigens; D005260:Female; D005796:Genes; D006801:Humans; D008171:Lung Diseases / Q000097:blood / Q000235:genetics*; D008297:Male; D010641:Phenotype; D000515:alpha 1-Antitrypsin / Q000097:blood*
chemical_list: D001789:Blood Group Antigens; D000515:alpha 1-Antitrypsin