1. Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
2. Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Changsha, Hunan, China
3. Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Cancer Research Institute, Central South University, Key Laboratory of Carcinogenesis, Ministry of Health, Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Changsha, Hunan, China