1. The Colorectal and Anal Surgery Department of Shanxi Provincial People’s Hospital, Shanxi Medical University, Taiyuan 030012, China
2. The Anesthesiology Department of Shanxi Provincial People’s Hospital, Shanxi Medical University, Taiyuan 030012, China
3. Shanxi Provincial People’s Hospital, Taiyuan 030012, China
4. Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China