About the Authors

Guoyu Tao

gat3@cdc.gov.

Affiliation Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Jennifer Hua

Affiliation Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Jessica L. Chen

Affiliation Division of STD Prevention, National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GT JH JC. Performed the experiments: GT JH JC. Analyzed the data: GT JH JC. Contributed reagents/materials/analysis tools: GT JH JC. Wrote the paper: GT JH JC.