title: [Etiology of malignant rheumatoid arthritis. (4) HLA antigen].
mesh_terms: D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D006680:HLA Antigens; D006649:Histocompatibility Antigens; D006801:Humans; D008875:Middle Aged
chemical_list: D006680:HLA Antigens; D006649:Histocompatibility Antigens