1. Sichuan Cancer Hospital & Institute, Chengdu, China
2. Department of Gastroenterology, Affiliated Hospital of Southwest Medical University, Luzhou, China
3. Peking University Third Hospital, Beijing, China
4. Peking University School of Stomatology, Beijing, China
5. Center for Medical Informatics, Peking University, Beijing, China
6. School of Medical Informatics and Engineering, Southwest Medical University, Luzhou, China