Letter: Peak-dose dysphonia in parkinsonism.
D006801:Humans; D007980:Levodopa / Q000008:administration & dosage* / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000150:complications* / Q000188:drug therapy; D013064:Speech Disorders / Q000139:chemically induced*
D007980:Levodopa