No abstract available
Publication types
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Comparative Study
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Discrimination, Psychological*
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Dose-Response Relationship, Drug
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Humans
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Hydromorphone / pharmacology*
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Male
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Pentazocine / pharmacology*
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Placebos
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Substance-Related Disorders / physiopathology*
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Substance-Related Disorders / rehabilitation
Substances
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Placebos
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Hydromorphone
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Pentazocine