No abstract available
Publication types
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Letter
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Randomized Controlled Trial
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Research Support, Non-U.S. Gov't
MeSH terms
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Adult
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Aged
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Analgesia, Epidural / instrumentation*
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Analgesia, Epidural / methods
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Epidural Space / diagnostic imaging*
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Equipment Failure*
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Female
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Humans
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Male
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Middle Aged
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Single-Blind Method
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Thoracic Vertebrae / diagnostic imaging*