[Rheumatoid factor and complement].
D001172:Arthritis, Rheumatoid / Q000276:immunology*; D003165:Complement System Proteins / Q000032:analysis*; D006801:Humans; D012217:Rheumatoid Factor / Q000032:analysis*; D013582:Synovial Fluid / Q000276:immunology
D003165:Complement System Proteins; D012217:Rheumatoid Factor