No abstract available
MeSH terms
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Analgesics, Opioid / therapeutic use*
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Chronic Pain / drug therapy
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Cocaine / urine*
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Cocaine-Related Disorders / diagnosis*
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Drug Monitoring
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Female
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Humans
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Hydrocodone / therapeutic use*
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Hydrocodone / urine
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Immunoassay
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Low Back Pain / drug therapy*
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Middle Aged
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Opioid-Related Disorders / diagnosis
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Sensitivity and Specificity
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Substance Abuse Detection*
Substances
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Analgesics, Opioid
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Hydrocodone
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Cocaine