1. Department of Hepatopancreatobiliary Medicine, Digestive Diseases Center, The Second Hospital, Jilin University, Changchun 130000, PR China
2. Department of Endocrinology, The Second Hospital of Jilin University, Changchun 130000, PR China
3. Department of Gastrointestinal and Colorectal Surgery, China-Japan Union, Hospital of Jilin University, Changchun 130000, PR China