2208
A liver biopsy in 2012 revealed marked fibrosis, leading the patient to start hepatitis C treatment with peginterferon alfa-2a, ribavirin and boceprevir.
 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 