1. Department of General Surgery, Dongguan People’s Hospital, Southern Medical University, Dongguan, Guangdong, China (mainland)
2. Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Gastrointestinal Institute of Gastroenterology, Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China (mainland)
3. Department of General Surgery, Second Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, China (mainland)
4. Department of Colorectal and Anal Surgery, Clinical Center of Intestinal and Colorectal Diseases of Hubei Province, Key Laboratory of Intestinal and Colorectal Diseases of Hubei Province, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China (mainland)