Faris, P L Evidence for the neuropeptide cholecystokinin as an antagonist of opiate analgesia. [electronic resource] - Science (New York, N.Y.) Jan 1983 - 310-2 p. digital Publication Type: Journal Article ISSN: 0036-8075 Standard No.: 10.1126/science.6294831 doi Subjects--Topical Terms: AnimalsCholecystokinin--pharmacologyConditioning, ClassicalMorphine--antagonists & inhibitorsPain--physiopathologyReceptors, Cell Surface--physiologyReceptors, Opioid--drug effects