1 Acute Abdominal Surgery department, The Second Hospital of Dalian Medical University, Liaoning, Dalian, 116027, China; Anorectal department, Dalian University affiliated Xinhua Hospital, Liaoning, Dalian, 116021, China.
3 Acute Abdominal Surgery department, The Second Hospital of Dalian Medical University, Liaoning, Dalian, 116027, China.
4 Acute Abdominal Surgery department, The Second Hospital of Dalian Medical University, Liaoning, Dalian, 116027, China. Electronic address: fuwenluo@aliyun.com.