1. Department of Epidemiology, School of Public Health, National Vaccine Innovation Platform, Nanjing Medical University, Nanjing, PR China
2. Department of Immunization Program, Suzhou Center for Disease Control and Prevention, Suzhou, PR China
3. Children’s Vaccination Assessment Clinic, Children’s Hospital of Soochow University, Suzhou, PR China
4. Department of Immunization Program, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, PR China
5. Chinese Centre for Disease Control and Prevention, Beijing, PR China