1. Department of Immunization Planning, Luohu District Center for Disease Control and Prevention, Shenzhen, China
2. Shenzhen Field Epidemiology Training Program (SZFETP), Shenzhen, China
3. Department of Immunization Planning, Baoan District Center for Disease Control and Prevention, Shenzhen, China
4. Department of Health Monitoring and Management, Futian District Center for Disease Control and Prevention, Shenzhen, China
5. Department of Disease Control, Baoan Public Health Service Centre, Shenzhen, China
6. Division of Disease Control, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
7. Department of Occupational Health, Longgang District Center for Disease Control and Prevention, Shenzhen, China
8. Department of Medical Institution Supervision and Management, Baolong Public Health Service Center, Shenzhen, China
9. Department of Disease Control, Futian District Center for Disease Control and Prevention, Shenzhen, China
10. Department of Administration office, Futian District Center for Disease Control and Prevention, Shenzhen, China