title: Letter: Do changes in blood levels of other aromatic aminoacids influence levodopa therapy?
mesh_terms: D000596:Amino Acids / Q000097:blood*; D001812:Blood-Brain Barrier / Q000187:drug effects; D006639:Histidine / Q000097:blood; D006801:Humans; D007980:Levodopa / Q000494:pharmacology / Q000627:therapeutic use*; D010300:Parkinson Disease / Q000097:blood / Q000188:drug therapy*; D010649:Phenylalanine / Q000097:blood; D014364:Tryptophan / Q000097:blood
chemical_list: D000596:Amino Acids; D007980:Levodopa; D010649:Phenylalanine; D006639:Histidine; D014364:Tryptophan