1. Department of Hepato-Biliary-Pancreato-Vascular Surgery, The First Affiliated Hospital of Xiamen University, Xiamen, Fujian, China (mainland)
2. Department of Hepatobiliary Surgery, The 101th Hospital of Chinese PLA, Wuxi, Jiangsu, China (mainland)
3. Department of Anaesthesiology, Second Hospital of Jilin University, Changchun, Jilin, China (mainland)
4. Department of General Surgery, Second Hospital of Lanzhou University, Lanzhou, Gansu, China (mainland)