title: [CNS-relapse rate and its prognosis in childhood ALL. Children's Cancer and Leukemia Study Group].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002493:Central Nervous System Diseases / Q000453:epidemiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007945:Leukemia, Lymphoid / Q000097:blood / Q000453:epidemiology*; D007958:Leukocyte Count; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000453:epidemiology*; D011379:Prognosis; D013997:Time Factors