1. Department of Hepatopancreatobiliary Medicine, The Second Hospital of Jilin University, Changchun, China;
2. Digestive Department, The General Hospital of China National Petroleum Corporation in Jilin, China;
3. Department of Radiology, The Second Hospital of Jilin University, Changchun, China;
4. Surgical Department of Gastrointestine and Nutrition, The Second Hospital of Jilin University, Changchun, China