1. Department of Gastroenterology and Hepatology, West China Hospital, Sichuan University, Chengdu 610041, China
2. Sichuan University-Oxford University Huaxi Joint Center for Gastrointestinal Cancer, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu 610041, China
3. Department of Medical Oncology, West China Hospital, Sichuan University, Chengdu 610041, China