title: Letter: Rheumatoid arthritis and alpha-1-antitrypsin.
mesh_terms: D000328:Adult; D000483:Alleles; D001172:Arthritis, Rheumatoid / Q000235:genetics*; D006579:Heterozygote; D006801:Humans; D000515:alpha 1-Antitrypsin / Q000032:analysis
chemical_list: D000515:alpha 1-Antitrypsin