title: The occurrence of two rheumatoid factors in blood and joint fluid of rheumatoid arthritis.
mesh_terms: D000818:Animals; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D005260:Female; D006386:Hemagglutination Tests; D006801:Humans; D007122:Immunoelectrophoresis; D008259:Macroglobulins / Q000302:isolation & purification; D008297:Male; D051381:Rats; D012217:Rheumatoid Factor / Q000032:analysis* / Q000302:isolation & purification; D013582:Synovial Fluid / Q000276:immunology*
chemical_list: D008259:Macroglobulins; D012217:Rheumatoid Factor