1. Department of Liver and Laparoscopic Surgery; Digestive and Vascular Surgery Center; The First Affiliated Hospital of Xinjiang Medical University; Urumqi, Xinjiang Uyghur Autonomous Region P.R. China
2. Department of Hepatobiliary Surgery; Beijing Tsinghua Chang Gung Hospital; Beijing P.R. China
3. Hospital and Institute of Hepatobiliary Surgery; Chinese PLA General Hospital; Beijing P.R. China
4. Department of Hepatobiliary Surgery; Peking Union Medical College Hospital; Beijing P.R. China