Efficacy of lengthy therapy in childhood acute lymphoblastic leukemia.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007945:Leukemia, Lymphoid / Q000188:drug therapy*; D008297:Male; D012008:Recurrence; D013997:Time Factors