title: Speech changes in parkinsonism during L-dopa therapy: preliminary findings.
mesh_terms: D000368:Aged; D002986:Clinical Trials as Topic; D004295:Dihydroxyphenylalanine / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000188:drug therapy*; D013064:Speech Disorders / Q000188:drug therapy*; D013223:Statistics as Topic; D013997:Time Factors; D014705:Verbal Behavior
chemical_list: D004295:Dihydroxyphenylalanine