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Epidural morphine improves postoperative analgesia in patients after total knee arthroplasty: A randomized controlled trial
- Zhao-Ting Meng,
- Fan Cui,
- Xue-Ying Li,
- Dong-Xin Wang
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- Published: July 1, 2019
- https://doi.org/10.1371/journal.pone.0219116