1. Department of Infectious Diseases, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi, China
2. State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi’an, Shaanxi, China
3. Department of Internal Medicine, Central Medical Branch of Chinese PLA General Hospital, Beijing, China
4. Department of Clinical Laboratory, Shaanxi Provincial People’s Hospital, Xi’an, Shaanxi, China
5. School of Software Engineering, Beijing Jiaotong University, Beijing, China