1. Department of Communicable Disease Control and Prevention, Baoan District Center for Disease Control and Prevention, Shenzhen, China
2. Shenzhen Field Epidemiology Training Program (SZFETP), Shenzhen, China
3. Department of Immunization Planning, Luohu District Center for Disease Control and Prevention, Shenzhen, China
4. Department of Disease Control, Baoan Public Health Service Centre, Shenzhen, China
5. Department of Immunization Planning, Baoan District Center for Disease Control and Prevention, Shenzhen, China
6. Division of Immunization Planning, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
7. Division of Communicable Disease Control and Prevention, Shenzhen Center for Disease Control and Prevention, Shenzhen, China