Registers in the study of pediatric rheumatic diseases--limitations and potential.
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D000293:Adolescent; D002170:Canada / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D006285:Health Planning / Q000379:methods; D006801:Humans; D012042:Registries; D012216:Rheumatic Diseases / Q000145:classification / Q000453:epidemiology* / Q000209:etiology / Q000628:therapy; D006113:United Kingdom / Q000453:epidemiology; D014481:United States / Q000453:epidemiology