1. Department of Colorectal Surgery, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, P.R. China
2. Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, P.R. China
3. Laboratory of Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, P.R. China
4. Department of Gastrointestinal Endoscopy, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, P.R. China
5. Department of Gastrointestinal Surgery, Shenzhen Baoan Shajing People’s Hospital, Guangzhou Medical University, Shenzhen, Guangdong, P.R. China