2817
OBSERVATIONS: A 48-year-old woman presented with disfiguring facial edema 10 weeks after she began antiviral therapy with peginterferon alfa-2a and ribavirin for chronic hepatitis C infection.
 ( adverse event: after ,  A 48-year-old woman: Subject, 48-year-old: Subject.Age, woman: Subject.Gender, disfiguring facial edema: Effect, 10 weeks: Treatment, antiviral therapy with peginterferon alfa-2a and ribavirin: Treatment, chronic hepatitis C infection: Treatment.Disorder, 10 weeks: Treatment.Time_elapsed, peginterferon alfa-2a: Treatment.Drug, ribavirin: Treatment.Drug, peginterferon alfa-2a: Combination.Drug, ribavirin: Combination.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:
 ( adverse event: after ,  A 48-year-old woman: Subject, 48-year-old: Subject.Age, woman: Subject.Gender, disfiguring facial edema: Effect, 10 weeks: Treatment, antiviral therapy with peginterferon alfa-2a and ribavirin: Treatment, chronic hepatitis C infection: Treatment.Disorder, 10 weeks: Treatment.Time_elapsed, peginterferon alfa-2a: Treatment.Drug, ribavirin: Treatment.Drug, peginterferon alfa-2a: Combination.Drug, ribavirin: Combination.Drug) 