Affiliations

• ¹ Department of Gastroenterology and Sichuan, University-Oxford University Huaxi, Gastrointestinal, Cancer of West China Hospital Sichuan, University Chengdu, Sichuan, China.
• ² Department of Gastroenterology and, COVID19 Medical Team (Hubei) of West China Hospital Sichuan University and, Medical Assistance Teams, East Branch of the Renmin Hospital of Wuhan University and, Sichuan University -Oxford University Huaxi Gastrointestinal, Cancer of West China Hospital Sichuan University, Chengdu, Sichuan, China.