1. Department of Colorectal Surgery, The 6th Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
2. Department of Traditional Chinese Medicine, The 1st Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
3. Department of Pathology, The 6th Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
4. Gastrointestinal Diseases Research Institute of Guangdong Province, The 6th Affiliated Hospital, Sun Yat-sen University, Guangzhou, China