经骶尾部手术治疗高龄直肠癌患者低位保肛术后局部复发临床研究(附31例报告)
경저미부수술치료고령직장암환자저위보항술후국부복발림상연구(부31례보고)
The clinical curative effect observation of 31 elderly patients with posterior resection of postoperative local recurrence of rectal cancer
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