Continuous infusion in rats as a method of assessing morphine-like physical dependence for opiates.
D000818:Animals; D004195:Disease Models, Animal; D004745:Enkephalins; D006801:Humans; D008297:Male; D009021:Morphine Dependence; D009294:Narcotics / Q000008:administration & dosage*; D009293:Opioid-Related Disorders; D051381:Rats; D011919:Rats, Inbred Strains
D004745:Enkephalins; D009294:Narcotics