1 Department of Hepatic Surgery VI, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, 225 Changhai Road, Shanghai 200433, China.
2 Department of Hepatic Surgery VI, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, 225 Changhai Road, Shanghai 200433, China; Faculty of Hepato-Biliary-Pancreatic Surgery, the First Medical Center of Chinese People's Liberation Army (PLA) General Hospital, Beijing 100039, China.
3 Department of Hepatic Surgery VI, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, 225 Changhai Road, Shanghai 200433, China. Electronic address: chengshuqun@aliyun.com.