1. Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, People’s Republic of China
2. School of Professional Studies, Columbia University, New York, NY, USA
3. Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, People’s Republic of China
4. Department of Gastrointestinal Surgery, West China Hospital of Sichuan University, Chengdu, People’s Republic of China
5. Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, People’s Republic of China
6. State Key Laboratory of Respiratory Health and Multimorbidity, Chengdu, People’s Republic of China