No abstract available
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Adrenergic beta-Antagonists / analysis*
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Analgesics, Opioid / analysis*
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Chromatography, High Pressure Liquid / methods*
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Humans
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Metoprolol / analysis*
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Tramadol / analysis*
Substances
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Adrenergic beta-Antagonists
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Analgesics, Opioid
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Tramadol
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Metoprolol