[Research on the claimed "familiarity" of the rheumatoid factor].
D001168:Arthritis; D001172:Arthritis, Rheumatoid / Q000097:blood*; D006801:Humans; D007159:Immunologic Tests; D012106:Research; D012217:Rheumatoid Factor
D012217:Rheumatoid Factor
ARTHRITIS, RHEUMATOID/blood