title: [Juvenile rheumatoid arthritis. Comparative clinical studies between juvenile and adult onset RA].
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001171:Arthritis, Juvenile / Q000235:genetics / Q000276:immunology*; D001172:Arthritis, Rheumatoid / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D012217:Rheumatoid Factor / Q000032:analysis; D012737:Sex Factors
chemical_list: D012217:Rheumatoid Factor