Comparison of Efficacy and Safety Between Laparoscopic and Open Radical Resection for Hilar Cholangiocarcinoma—A Propensity Score-Matching Analysis oleh Yong-Gang He, Wen Huang, Qian Ren, Jing Li, Feng-Xia Yang, Chang-Lin Deng, Li-Qi Li, Xue-Hui Peng, Yi-Chen Tang, Lu Zheng, Xiao-Bing Huang, Yu-Ming Li