Combination opioid analgesics
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PII: S1366-0071(08)00105-8
doi:10.1016/j.acpain.2008.05.025
© 2008 Published by Elsevier Inc.
PII: S1366-0071(08)00105-8
doi:10.1016/j.acpain.2008.05.025
© 2008 Published by Elsevier Inc.