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We present a case of stroke after PPA ingestion that occurred 4 months after the recall in an 8-year-old boy on chronic peritoneal dialysis.
 an 8-year-old boy on chronic peritoneal dialysis: Subject; 8-year-old: Subject.Age; boy: Subject.Gender; stroke: Effect; PPA: Treatment; PPA: Treatment.Drug; 4 months: Treatment.Time_elapsed
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:
 an 8-year-old boy on chronic peritoneal dialysis: Subject; 8-year-old: Subject.Age; boy: Subject.Gender; stroke: Effect; PPA: Treatment; PPA: Treatment.Drug; 4 months: Treatment.Time_elapsed