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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 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 potential therapeutic event: treatment 