title: [Brain substances with a morphine effect--new light on pain].
mesh_terms: D015670:Acupuncture Therapy; D000698:Analgesia; D000818:Animals; D001923:Brain Chemistry; D006801:Humans; D009020:Morphine; D010455:Peptides / Q000494:pharmacology* / Q000502:physiology; D051381:Rats
chemical_list: D010455:Peptides; D009020:Morphine
vernacular_title: Breinsubstansies met morfienagtige effekte--nuwe lig op pyn