老年食管癌患者围手术期心肺功能保护探讨(附22例报告)
노년식관암환자위수술기심폐공능보호탐토(부22례보고)
The investigation of gerontal patient with esophageal cancer in perioperative period the cardiopulmonary(unction aegis(attach 22 cases' reports)
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