1549
RESULTS: A 52-year-old woman with Parkinson disease who had taken amantadine for 6 years had bilateral corneal edema for 2 months at baseline.
 ( adverse event: had ,  A 52-year-old woman with Parkinson disease: Subject, 52-year-old: Subject.Age, woman: Subject.Gender, bilateral corneal edema for 2 months at baseline: Effect, taken amantadine for 6 years: Treatment, Parkinson disease: Treatment.Disorder, amantadine: Treatment.Drug, 6 years: Treatment.Duration) 
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: had ,  A 52-year-old woman with Parkinson disease: Subject, 52-year-old: Subject.Age, woman: Subject.Gender, bilateral corneal edema for 2 months at baseline: Effect, taken amantadine for 6 years: Treatment, Parkinson disease: Treatment.Disorder, amantadine: Treatment.Drug, 6 years: Treatment.Duration) 