1. Department of Gastrointestinal Colorectal and Anal Surgery, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130021, P.R.�China
2. Department of Gastrointestinal Colorectal and Anal Surgery, China‑Japan Union Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
3. College of Basic Medical Sciences, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
4. Jilin Cancer Hospital, Changchun, Jilin 130021, P.R.�China