1. Department of Gastrointestinal surgery, the First Affiliated Hospital of Xinxiang Medical University, Weihui, People’s Republic of China
2. Department of Gastrointestinal, the First Affiliated Hospital of Xinxiang Medical University, Weihui 453100, Henan Province, People’s Republic of China
3. ICU, the First Affiliated Hospital of Xinxiang Medical University, Weihui, People’s Republic of China