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Our patient was a 72-year-old man with advanced Parkinson's disease (PD) who received levodopa and anti-cholinergic drugs and whose head had become almost completely bald.
 ( adverse event: become ,  a 72-year-old man with advanced Parkinson's disease (PD): Subject, 72-year-old: Subject.Age, man: Subject.Gender, completely bald: Effect, levodopa and anti-cholinergic drugs: Treatment, advanced Parkinson's disease (PD): Treatment.Disorder, levodopa: Treatment.Drug, anti-cholinergic drugs: 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:
 ( adverse event: become ,  a 72-year-old man with advanced Parkinson's disease (PD): Subject, 72-year-old: Subject.Age, man: Subject.Gender, completely bald: Effect, levodopa and anti-cholinergic drugs: Treatment, advanced Parkinson's disease (PD): Treatment.Disorder, levodopa: Treatment.Drug, anti-cholinergic drugs: Treatment.Drug) 