HBcAb positivity increases the risk of postoperative complications after extended hemihepatectomy for hilar cholangiocarcinoma oleh Wen‐Qiang Wang, Guang‐Yuan Xu, Jian Li, Bin‐Yong Liang, Jiang Li, Mei‐Long Lin, Xiao‐Ping Chen, Er‐Lei Zhang, Zhi‐Yong Huang