腹腔镜联合骶尾部切口在超低位直肠癌保肛术中的应用
복강경연합저미부절구재초저위직장암보항술중적응용
The Value of Laparoscopy Combined with Sacral Coccygeal Approach in Sphincter-preserving Surgery for Ultra-low Rectal Carcinoma
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