No abstract available
MeSH terms
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Aged
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Aged, 80 and over
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Analgesics, Opioid / administration & dosage
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Female
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Humans
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Infusion Pumps, Implantable*
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Injections, Spinal / methods*
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Male
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Middle Aged
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Morphine / administration & dosage*
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Pain, Intractable / drug therapy*
Substances
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Analgesics, Opioid
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Morphine