title: Family studies in systemic lupus erythematosus (SLE). VI. Presence of rheumatoid factors in relatives and spouses.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000818:Animals; D002908:Chronic Disease; D004912:Erythrocytes / Q000276:immunology; D005260:Female; D006386:Hemagglutination Tests; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000235:genetics* / Q000276:immunology; D008297:Male; D008722:Methods; D008875:Middle Aged; D009664:Norway; D012217:Rheumatoid Factor / Q000032:analysis*; D012712:Serum Globulins; D012737:Sex Factors; D012756:Sheep / Q000276:immunology
chemical_list: D012712:Serum Globulins; D012217:Rheumatoid Factor