title: Adult and juvenile rheumatoid arthritis: current epidemiologic concepts.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001171:Arthritis, Juvenile / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology; D001172:Arthritis, Rheumatoid / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D011159:Population Surveillance; D011379:Prognosis