地佐辛复合舒芬太尼用于老年胃肠道肿瘤根治术患者术后静脉自控镇痛的临床效果
지좌신복합서분태니용우노년위장도종류근치술환자술후정맥자공진통적림상효과
Clinical effect of dezocine combined with sufentanil on postoperative analgesia in elderly patients with radical resection of gastroenteric tumor
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