1. Department of Gastrointestinal Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
2. Department of Gastrointestinal and Colorectal Surgery, China-Japan Union Hospital, Jilin University, Changchun, Jilin 130033, P.R. China
3. Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin 130021, P.R. China
4. Department of Hepatobiliary and Pancreatic Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
5. Department of Thoracic Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China