1. Department of Gastroenterology, Zhongshan Hospital Affiliated to Xiamen University, Xiamen, Fujian 361004, P.R. China
2. Medical College, Xiamen University, Xiamen, Fujian 361004, P.R. China
3. Department of Oncology and Vascular Interventional Radiology, Zhongshan Hospital Affiliated to Xiamen University, Xiamen, Fujian 361004, P.R. China
4. Department of Hepatic Surgery, Zhongshan Hospital Affiliated to Xiamen University, Xiamen, Fujian 361004, P.R. China
5. Department of Physical Emergency, Zhongshan Hospital Affiliated to Xiamen University, Xiamen, Fujian 361004, P.R. China