Infection with E. B. virus and rheumatoid arthritis.
D001172:Arthritis, Rheumatoid / Q000209:etiology* / Q000276:immunology; D002051:Burkitt Lymphoma / Q000150:complications*; D006801:Humans; D012217:Rheumatoid Factor / Q000096:biosynthesis
D012217:Rheumatoid Factor