1. Department of Colorectal Surgery The Sixth Affiliated Hospital Sun Yat‐sen University Guangzhou Guangdong China
2. Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Disease Guangdong Institute of Gastroenterology The Sixth Affiliated Hospital Sun Yat‐sen University Guangzhou Guangdong China
3. Zhongshan School of Medicine Sun Yat‐sen University Guangzhou Guangdong China