No abstract available
MeSH terms
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Abdomen / diagnostic imaging*
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Abdomen / surgery*
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Abdominal Muscles / diagnostic imaging*
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Abdominal Muscles / innervation*
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Adult
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Aged
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Aged, 80 and over
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Analgesia, Epidural / methods*
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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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Nerve Block / methods*
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Retrospective Studies
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Ultrasonography