1. Department of Gastroenterology, the Affiliated Hospital of Southwest Medical University, Luzhou, China
2. Nuclear Medicine and Molecular Imaging Key Laboratory of Sichuan Province, Luzhou, China
3. Department of Gastroenterology, Lianshui County People’s Hospital, Huaian, China
4. Department of Gastroenterology, Lianshui People’s Hospital of Kangda College Affiliated to Nanjing Medical University, Huaian, China
5. Department of Gastroenterology, Clinical Medical College and the First Affiliated Hospital of Chengdu Medical College, Chengdu City, China.