Effects of withdrawing dopa in Parkinson's disease.
D000368:Aged; D004295:Dihydroxyphenylalanine / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000188:drug therapy*; D010919:Placebos
D010919:Placebos; D004295:Dihydroxyphenylalanine