1. Shandong Provincial Key Laboratory of Infectious Disease Control and Prevention, Shandong Center for Disease Control and Prevention, Jinan, China
2. Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
3. Department of Clinical Laboratory, Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
4. School of Medicine, Jinan University, Guangzhou, China
5. National Immunization Program, Chinese Center for Disease Control and Prevention, Beijing, China
6. School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China