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 Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University , Guangzhou, Guangdong , China
3. Bioland Laboratory, Guangzhou Regenerative Medicine and Health Guangdong Laboratory , Guangzhou , China