About the Authors

Song Guo

Affiliation Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China

Feng Ling

Affiliation Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China

Juan Hou

Affiliation Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China

Jinna Wang

Affiliation Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China

Guiming Fu

Affiliation Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China

Zhenyu Gong

zhygong@cdc.zj.cn

Affiliation Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ZG. Performed the experiments: SG FL JH JW GF. Analyzed the data: SG. Contributed reagents/materials/analysis tools: FL. Wrote the paper: SG.