title: Letter: HL-A antigens in rheumatoid arthritis.
mesh_terms: D000818:Animals; D001172:Arthritis, Rheumatoid / Q000209:etiology / Q000276:immunology*; D006648:Histocompatibility; D006649:Histocompatibility Antigens / Q000302:isolation & purification*; D006801:Humans; D051379:Mice
chemical_list: D006649:Histocompatibility Antigens