No abstract available
Publication types
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Research Support, U.S. Gov't, Non-P.H.S.
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Research Support, U.S. Gov't, P.H.S.
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Review
MeSH terms
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Animals
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Choice Behavior
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Food
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Pharmaceutical Preparations
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Reinforcement Schedule*
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Self Administration*
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Social Environment
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Time Factors
Substances
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Pharmaceutical Preparations