1. Gamaknife Center, No 411 Hospital of the Chinese People’s Liberation Army, Shanghai 200081, China
2. Department of Liver Surgery, Fudan University Shanghai Cancer Center, Cancer Hospital, Shanghai 200032, China
3. Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
4. Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200433, China