The relationship of rheumatoid factor to age of onset in juvenile rheumatoid arthritis.
D000293:Adolescent; D000367:Age Factors; D000818:Animals; D001171:Arthritis, Juvenile / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D003093:Colitis, Ulcerative / Q000276:immunology; D003882:Dermatomyositis / Q000276:immunology; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007841:Latex Fixation Tests; D008297:Male; D008722:Methods; D011817:Rabbits; D012217:Rheumatoid Factor / Q000032:analysis*; D012595:Scleroderma, Systemic / Q000276:immunology; D012756:Sheep
D012217:Rheumatoid Factor