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Cocaine
Methamphetamine
Dextroamphetamine
Dopamine
Methadone
Morphine
Substance-Related Disorders
Heart Rate
Macaca mulatta
Haplorhini
Rats
Inbred Strains Rats
Drug Dose Response Relationship
Time Factors
Reinforcement Schedule
Self Administration
Animal Behavior
Conditioning, Operant
Drug Tolerance
United States
Co-Publications
32
15
11
9
8
5
4
3
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