1. Department of Vascular Surgery, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
2. Department of Gastrointestinal Surgery, First Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
3. Department of Gastrointestinal Surgery, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China