1 Liver Cancer Institute, Zhongshan Hospital, Fudan University and Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, People's Republic of China.
2 Department of Hepatobiliary and Pancreatic Surgery, the Second Affiliated Hospital of Nanchang University, Nanchang, People's Republic of China.
3 Neurosurgery Department of Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China.