title: Neutral amino acid therapy for the management of chronic pain.
mesh_terms: D000818:Animals; D002908:Chronic Disease; D004745:Enkephalins / Q000378:metabolism; D006801:Humans; D010146:Pain / Q000188:drug therapy*; D010649:Phenylalanine / Q000494:pharmacology / Q000627:therapeutic use*; D012701:Serotonin / Q000378:metabolism; D004561:Transcutaneous Electric Nerve Stimulation; D014364:Tryptophan / Q000494:pharmacology / Q000627:therapeutic use*
chemical_list: D004745:Enkephalins; D012701:Serotonin; D010649:Phenylalanine; D014364:Tryptophan