1. Institute of Infectious Diseases, Beijing Ditan Hospital, Capital Medical University, China
2. Beijing Key Laboratory of Emerging Infectious Diseases, Capital Medical University, China
3. Center of Infectious Disease, Beijing Ditan Hospital, Capital Medical University, China
4. Department of Infectious Diseases, Dandong Infectious Disease Hospital, China
5. Department of Infectious Diseases, Taian City Central Hospital, China
6. Department of Infectious Disease, Qing Dao No. 6 People’s Hospital, China