title: Rheumatoid factors in families.
mesh_terms: D000818:Animals; D005260:Female; D011247:Pregnancy; D011817:Rabbits / Q000276:immunology; D000367:Age Factors; D000372:Agglutination Tests; D001171:Arthritis, Juvenile / Q000276:immunology; D001172:Arthritis, Rheumatoid / Q000235:genetics / Q000276:immunology; D004739:England; D005060:Europe; D005428:Flocculation Tests; D005843:Geography; D007198:Indians, North American; D007841:Latex Fixation Tests; D008180:Lupus Erythematosus, Systemic / Q000276:immunology; D010375:Pedigree; D011379:Prognosis; D012217:Rheumatoid Factor / Q000032:analysis; D014427:Twins; D014481:United States; D006801:Humans
chemical_list: D012217:Rheumatoid Factor