1. Institute of Infectious Diseases, Beijing Ditan HospitalCapital Medical UniversityBeijingChina
2. Beijing Key Laboratory of Emerging Infectious DiseasesBeijingChina
3. Peking University Ditan Teaching HospitalBeijingChina
4. The First Affiliated Hospital of Xinjiang Medical UniversityXinjiangChina
5. Dalian UniversityDalianChina