1. Department of Respiratory and Critical Medicine, Zhengzhou University People’s Hospital, Zhengzhou 450003, China
2. Department of Infectious Diseases, Anhui Provincial Hospital, Hefei 230001, China
3. Department of Digestive Diseases, Zhengzhou University People’s Hospital, Zhengzhou 450003, China
4. Medical Research Center, Zhengzhou University People’s Hospital, Zhengzhou 450003, China