title: [Letter: Effectiveness of L-tryptophan on Parkinsonian tremor. Preliminary study].
mesh_terms: D000328:Adult; D000368:Aged; D004341:Drug Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000188:drug therapy*; D014364:Tryptophan / Q000627:therapeutic use*
chemical_list: D014364:Tryptophan
vernacular_title: Efficacité du L-tryptophanne sur le tremblement parkinsonien. Etude préliminaire