title: HLA-DRw4, rheumatoid factor, and prognosis in rheumatoid arthritis.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000145:classification / Q000276:immunology*; D006680:HLA Antigens / Q000302:isolation & purification*; D006801:Humans; D011379:Prognosis; D012217:Rheumatoid Factor / Q000302:isolation & purification*
chemical_list: D006680:HLA Antigens; D012217:Rheumatoid Factor