Acute Pain
Volume 11, Issue 3 , Pages 93-99 , December 2009

Comparison of fentanyl and butorphanol for postoperative pain relief with intravenous patient controlled analgesia

Received 18 January 2009 ,Revised 1 September 2009 ,Accepted 12 September 2009.

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PII: S1366-0071(09)00045-X

doi: 10.1016/j.acpain.2009.09.001

Acute Pain
Volume 11, Issue 3 , Pages 93-99 , December 2009

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