开腹与腹腔镜全直肠系膜切除术治疗60例直肠癌的对比研究
개복여복강경전직장계막절제술치료60례직장암적대비연구
Comparative Study About Laparotomy and Laparoscopic Total Mesorectal Excision for Rectal Cancer in 60 Patients
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