title: Natural history of radiological changes of knee joint in juvenile rheumatoid arthritis.
mesh_terms: D000293:Adolescent; D001171:Arthritis, Juvenile / Q000000981:diagnostic imaging*; D002648:Child; D002675:Child, Preschool; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging*; D011379:Prognosis; D011859:Radiography