No abstract available
MeSH terms
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Administration, Oral
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Analgesics, Opioid / pharmacology
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Analgesics, Opioid / therapeutic use*
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Fentanyl / pharmacology
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Fentanyl / therapeutic use*
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Humans
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Neoplasms / complications*
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Pain / drug therapy*
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Pain / etiology
Substances
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Analgesics, Opioid
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Fentanyl