Letter: Parkinson's disease and ascorbate.
D001205:Ascorbic Acid / Q000627:therapeutic use*; D004359:Drug Therapy, Combination; D006801:Humans; D007980:Levodopa / Q000627:therapeutic use*; D010300:Parkinson Disease / Q000188:drug therapy*
D007980:Levodopa; D001205:Ascorbic Acid