No abstract available
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Circadian Rhythm / physiology*
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Darkness
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Drug Overdose*
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Heroin Dependence / rehabilitation
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Lethal Dose 50
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Light
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Methadone / administration & dosage*
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Methadone / adverse effects
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Methadone / toxicity*
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Rats
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Survival Rate