1. Department of Environmental HealthZhejiang Provincial Center for Disease Control and PreventionHangzhou Zhejiang China
2. Department of Clinical LaboratoryFirst Affiliated Hospital of China Medical UniversityShenyang Liaoning China
3. Department of Immunization ProgrammeZhejiang Provincial Center for Disease Control and PreventionHangzhou Zhejiang China
4. Key Medical Research CenterZhejiang Provincial Center for Disease Control and PreventionHangzhou Zhejiang China