1. Department of Hepatobiliary Surgery; The General Hospital of Shenyang Military Area Command; Shenyang 100016 China
2. Post-doctoral Station; The General Hospital of Shenyang Military Area Command; Shenyang 10016 China
3. Department of Hepatobiliary and Pancreas Surgery; Beijing Tsinghua Changgung Hospital (BTCH); School of Clinical Medicine; Tsinghua University; Beijing China