The rheumatoid factor in serum and synovial fluid.
D001168:Arthritis; D001172:Arthritis, Rheumatoid / Q000175:diagnosis*; D006801:Humans; D012217:Rheumatoid Factor; D013582:Synovial Fluid
D012217:Rheumatoid Factor
ARTHRITIS, RHEUMATOID/diagnosis; SYNOVIAL FLUID