No abstract available
MeSH terms
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Analgesics, Opioid / adverse effects*
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Analgesics, Opioid / therapeutic use
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Humans
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Retrospective Studies
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Substance-Related Disorders / etiology*
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Tension-Type Headache / drug therapy*
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Tramadol / adverse effects*
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Tramadol / therapeutic use
Substances
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Analgesics, Opioid
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Tramadol