1 Department of Gastroenterology & Hepatology, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
2 Department of Gastroenterology & Hepatology, Sichuan University-Oxford University Huaxi Gastrointestinal Cancer Centre, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
3 COVID-19 Medical Team (Hubei) of West China Hospital, Sichuan University, Chengdu, Sichuan, China.
4 COVID-19 Medical Team (Hubei) of West China Hospital, East Branch of Renmin Hospital of Wuhan University, Wuhan, Hubei, China.