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Wistar Rats
Rats
Substance Withdrawal Syndrome
Morphine Dependence
Hyperalgesia
Pain
Naloxone
Narcotic Antagonists
Ethanol
Narcotics
Capsaicin
Morphine
Drug Dose Response Relationship
Pain Threshold
Pain Measurement
Conditioning, Operant
Self Administration
Injections, Intradermal
Cross-Over Studies
Double-Blind Method
Co-Publications
29
10
7
5
4
3
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