No abstract available
MeSH terms
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Cognition / drug effects
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Depression / drug therapy*
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Drug Evaluation
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Endorphins / adverse effects
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Endorphins / blood
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Endorphins / therapeutic use*
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Euphoria / drug effects
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Humans
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Naloxone / therapeutic use
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Peptides / therapeutic use*
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Radioimmunoassay
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Schizophrenia / drug therapy*
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Time Factors
Substances
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Endorphins
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Peptides
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Naloxone