title: The validity of a cancer register in leukaemia epidemiology.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D004739:England; D005069:Evaluation Studies as Topic; D006801:Humans; D007938:Leukemia / Q000453:epidemiology*; D008875:Middle Aged; D012042:Registries / Q000592:standards*