1. Medical College, Jiaying University, Meizhou 514031, China
2. Department of Immunology and Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China
3. Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Biomedical Innovation Center, Department of General Surgery, The Six Affiliated Hospital, Sun Yat-sen University, Guangzhou 510655, China
4. School of Medicine, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China