1. Department of Infectious Disease, Anhui Provincial Hospital, Anhui Medical University, Hefei, Anhui, China
2. Liver Center and Gastrointestinal Division, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
3. Department of Infectious Diseases, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
4. Department of Infectious Diseases, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
5. Department of Infectious Diseases, Peking University First Hospital, Beijing, China