Rare anatomical variants encountered during laparoscopic cholecystectomy in low resource conditions and the convenient concept of the safe zone of dissection: a prospective observational study at a single center

在资源匮乏的条件下行腹腔镜胆囊切除术时遇到的罕见解剖变异以及安全解剖区概念的便利性：一项单中心前瞻性观察研究