硬膜外小剂量吗啡联合静脉地佐辛与舒芬太尼用于食管癌术后镇痛的疗效观察
경막외소제량마배연합정맥지좌신여서분태니용우식관암술후진통적료효관찰
Clinical observation of low-dose epidural morphine combined with intravenous dezocine and sufentanil used in postoperative analgesia on patients with esophagus cancer
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