(Q43070519)
Statements
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Effect of epidural vs parenteral opioid analgesia on the progress of labor: a meta-analysis (English)
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S H Halpern
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B L Leighton
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A Ohlsson
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J F Barrett
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A Rice
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1 December 1998
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1 reference
280
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24
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2105-2110
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Identifiers
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