About the Authors

Guowu Liu

Contributed equally to this work with: Guowu Liu, Hongyan Lu

Affiliation Beijing Municipality Center for Disease Control and Prevention, Beijing, China

Hongyan Lu

Contributed equally to this work with: Guowu Liu, Hongyan Lu

Affiliation Beijing Municipality Center for Disease Control and Prevention, Beijing, China

Juan Wang

Affiliation Beijing Municipality Center for Disease Control and Prevention, Beijing, China

Dongyan Xia

Affiliation Beijing Municipality Center for Disease Control and Prevention, Beijing, China

Yanming Sun

Affiliation Beijing Municipality Center for Disease Control and Prevention, Beijing, China

Guodong Mi

mgdongcn@outlook.com (GDM); liming.wang@outlook.com (LMW)

Affiliation National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China

Liming Wang

mgdongcn@outlook.com (GDM); liming.wang@outlook.com (LMW)

Affiliation Beijing Ditan Hospital, Capital Medical University, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GWL HYL JW YMS GDM LMW. Performed the experiments: GWL HYL JW GDM LMW. Analyzed the data: GWL HYL JW DYX YMS GDM LMW. Contributed reagents/materials/analysis tools: GWL HYL DYX YMS GDM LMW. Wrote the paper: GWL HYL DYX GDM LMW. Contributed to the work of quality control on the study field implementation and data collection: GWL HYL DYX GDM LMW.