[The rheumatoid factor (RF, rheuma factor, agglutination activating factor, RA factor)].
D000371:Agglutination; D001168:Arthritis; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D006801:Humans; D012217:Rheumatoid Factor
D012217:Rheumatoid Factor
ARTHRITIS, RHEUMATOID/immunology