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We present two children with acute lymphocytic leukemia who developed leukoencephalopathy following administration of a combination of intravenous ara = C and methotrexate during the consolidation phase of chemotherapy.
 two children with acute lymphocytic leukemia: Subject; two: Subject.Population; children: Subject.Age; leukoencephalopathy: Effect; administration of a combination of intravenous ara = C and methotrexate during the consolidation phase of chemotherapy: Treatment; acute lymphocytic leukemia: Treatment.Disorder; intravenous: Treatment.Route; ara = C: Treatment.Drug; methotrexate: Treatment.Drug; ara = C: Combination.Drug; methotrexate: Combination.Drug
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: adverse event 
  Option: Treatment.Freq, Subject.Population, Combination.Drug, Subject.Gender, Treatment.Duration, Subject, Effect, Treatment, Treatment.Disorder, Subject.Disorder, Treatment.Route, Subject.Race, Treatment.Time_elapsed, Treatment.Dosage, Subject.Age, Treatment.Drug 
Text: {0} 
Answer:
 two children with acute lymphocytic leukemia: Subject; two: Subject.Population; children: Subject.Age; leukoencephalopathy: Effect; administration of a combination of intravenous ara = C and methotrexate during the consolidation phase of chemotherapy: Treatment; acute lymphocytic leukemia: Treatment.Disorder; intravenous: Treatment.Route; ara = C: Treatment.Drug; methotrexate: Treatment.Drug; ara = C: Combination.Drug; methotrexate: Combination.Drug