No abstract available
MeSH terms
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Administration, Topical
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Adult
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Aged
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Back Pain / drug therapy*
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Cocaine / therapeutic use*
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Double-Blind Method
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Drug Evaluation
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Female
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Ganglionic Blockers / therapeutic use*
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Humans
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Lidocaine / therapeutic use*
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Male
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Middle Aged
Substances
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Ganglionic Blockers
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Lidocaine
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Cocaine