No abstract available
Publication types
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Clinical Trial
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Randomized Controlled Trial
MeSH terms
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Acetates / therapeutic use
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Administration, Oral
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Adult
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Amino Alcohols / therapeutic use*
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Analysis of Variance
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Benzene Derivatives / therapeutic use
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Clinical Trials as Topic
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Codeine / urine
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Heroin*
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Humans
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Illinois
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Male
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Methadone / therapeutic use*
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Methylamines / therapeutic use
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Middle Aged
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Placebos
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Substance Withdrawal Syndrome
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Substance-Related Disorders / drug therapy*
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Substance-Related Disorders / urine
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Time Factors
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Work
Substances
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Acetates
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Amino Alcohols
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Benzene Derivatives
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Methylamines
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Placebos
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Heroin
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Methadone
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Codeine