舒芬太尼复合曲马多用于老年髋部手术患者术后静脉自控镇痛的研究
서분태니복합곡마다용우노년관부수술환자술후정맥자공진통적연구
Comparison of Patient-Controlled Intravenous Analgesia with Sufentanil and Sufentanil Combined with Tramadol for Elderly Patients Undergoing Hip Operation
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