Epidural morphine combined with single-injection femoral nerve block for postoperative analgesia in patients after total knee arthroplasty: study protocol of a randomized controlled trial v3 (protocols.io.wrwfd7e)

protocols.io ◽  
2019 ◽  
Author(s):  
Zhao Ting ◽  
Fan Cui ◽  
Xue Ying ◽  
Dong Xin
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