About the Authors

Rui Huang

Contributed equally to this work with: Rui Huang, Min Zhao

Affiliations Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, People’s Republic of China, Guangdong Provincial Institute of Public Health, Guangzhou, People’s Republic of China, School of Public Health, Sun Yat-Sen University, Guangzhou, People’s Republic of China

Min Zhao

Contributed equally to this work with: Rui Huang, Min Zhao

Affiliation Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, People’s Republic of China

Xingfen Yang

xingfenyang@hotmail.com

Affiliation Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, People’s Republic of China

Junming Huang

Affiliation Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, People’s Republic of China

Ying Yang

Affiliation Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, People’s Republic of China

Bifeng Chen

Affiliation Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, People’s Republic of China

Jianbin Tan

Affiliation Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, People’s Republic of China

Jiankang Huang

Affiliation Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, People’s Republic of China

Zhi Li

Affiliation Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, People’s Republic of China

Yingjian Lv

Affiliation Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, People’s Republic of China

Guiyuan Ji

Affiliations Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, People’s Republic of China, Guangdong Provincial Institute of Public Health, Guangzhou, People’s Republic of China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RH MZ XFY JMH. Performed the experiments: RH BFC JBT JKH. Analyzed the data: RH MZ YY. Contributed reagents/materials/analysis tools: JBT JMH ZL YJL GYJ. Wrote the paper: RH MZ.