1. Department of Colorectal and Anal Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
2. Department of Colorectal and Anal Surgery, The Second Clinical Medical College, Yangtze University, Jingzhou Central Hospital, Jingzhou 434020, China
3. Clinical Center of Intestinal and Colorectal Diseases of Hubei Province, Wuhan 430071, China
4. Key Laboratory of Intestinal and Colorectal Diseases of Hubei Province, Wuhan 430071, China
5. Colorectal and Anal Disease Research Centre, Medical School of Wuhan University, Wuhan 430071, China
6. Quality Control Centre of Colorectal and Anal Surgery of Health Commission of Hubei Province, Wuhan 430071, China