开腹直肠癌根治术与腹腔镜直肠癌手术治疗直肠癌老年患者的疗效以及安全性对比分析
개복직장암근치술여복강경직장암수술치료직장암노년환자적료효이급안전성대비분석
Comparative analysis of therapeutic effect and safety between laparoscopic and open radical operation on rectal cancer of gerontal patients
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