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A 6-year-old boy (weight: 16 kg, at the start of treatment) began sodium valproate (valproate syrup 5%) treatment for epilepsy in February 2012.
 ( potential therapeutic event: treatment ,  A 6-year-old boy (weight: 16 kg, at the start of treatment): Subject, 6-year-old: Subject.Age, boy: Subject.Gender, sodium valproate (valproate syrup 5%): Treatment, epilepsy: Treatment.Disorder, sodium valproate: Treatment.Drug) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: adverse event,potential therapeutic event, Arguments type: Treatment.Disorder,Treatment.Time_elapsed,Treatment.Dosage,Subject.Race,Treatment.Drug,Treatment.Route,Subject.Disorder,Treatment.Freq,Treatment,Effect,Subject.Population,Treatment.Duration,Combination.Drug,Subject,Subject.Age,Subject.Gender. 
Text: {0} 
Answer:
 ( potential therapeutic event: treatment ,  A 6-year-old boy (weight: 16 kg, at the start of treatment): Subject, 6-year-old: Subject.Age, boy: Subject.Gender, sodium valproate (valproate syrup 5%): Treatment, epilepsy: Treatment.Disorder, sodium valproate: Treatment.Drug) 