罗哌卡因与布比卡因复合芬太尼用于开胸术后PCEA的对比观察
라고잡인여포비잡인복합분태니용우개흉술후PCEA적대비관찰
Comparison of effect of ropivacaine-fentanyl with bupivacaine-fentanyl on PCEA after thoracotomy
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