About the Authors

Jing Wu

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

Yifei Hu

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

Yujiang Jia

Affiliation Department of Preventive Medicine, School of Medicine, Vanderbilt University, Nashville, Tennessee, United States of America

Yingying Su

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

Huixia Cui

Affiliation College of Nursing, Liaoning Medical University, Jinzhou, Liaoning, China

Huixin Liu

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

Ning Wang

wangnbj@163.com

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

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JW NW. Performed the experiments: JW YYS NW. Analyzed the data: JW YYS NW. Contributed reagents/materials/analysis tools: JW. Wrote the paper: JW NW. Revised and edited the manuscript, and approved the final version of the manuscript: JW YFH YJJ HXC HXL NW.