1 Department of Gastroenterology and Hepatology, West China Hospital of Sichuan University, Chengdu, 610041, Sichuan, China; Department of Gastroenterology and Hepatology, Sichuan University-Oxford University Huaxi Gastrointestinal Cancer Centre, West China Hospital of Sichuan University, Chengdu, 610041, Sichuan, China.
2 Department of Gastroenterology and Hepatology, West China Hospital of Sichuan University, Chengdu, 610041, Sichuan, China.
3 Department of Gastroenterology and Hepatology, West China Hospital of Sichuan University, Chengdu, 610041, Sichuan, China; Department of Gastroenterology and Hepatology, Sichuan University-Oxford University Huaxi Gastrointestinal Cancer Centre, West China Hospital of Sichuan University, Chengdu, 610041, Sichuan, China. Electronic address: yangjinlin@wchscu.cn.