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Rats
Inbred Lew Rats
Wistar Rats
Self Administration
Reinforcement Schedule
Autoradiography
Animal Behavior
Conditioning, Operant
Cocaine
Morphine
Cyclohexanols
Cannabinoids
Narcotics
Tetrahydrocannabinol
mu Opioid Receptors
Brain
Nucleus Accumbens
Hippocampus
Time Factors
Analysis of Variance
Co-Publications
24
16
14
10
8
7
5
4
3
2
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