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Macaca mulatta
Rats
Columbidae
Mouse
Drug Dose Response Relationship
Naltrexone
mu Opioid Receptors
Narcotic Antagonists
Morphine
Cocaine
Receptors, Opioid
Narcotics
kappa Opioid Receptors
delta Opioid Receptors
Analgesics, Opioid
Self Administration
Reinforcement Schedule
Animal Behavior
Conditioning, Operant
Discrimination Learning
Co-Publications
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