About the Authors

Xun Zhuang

Affiliations National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China, Department of Epidemiology and Biostatistics, School of Public Health, Nantong University, Nantong, Jiangsu Province, China

Zunyou Wu

wuzy@263.net

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

Katharine Poundstone

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

Changqing Yang

Affiliation Department of Epidemiology and Biostatistics, School of Public Health, Nantong University, Nantong, Jiangsu Province, China

Yaqin Zhong

Affiliation Department of Epidemiology and Biostatistics, School of Public Health, Nantong University, Nantong, Jiangsu Province, China

Shengyang Jiang

Affiliation Department of Epidemiology and Biostatistics, School of Public Health, Nantong University, Nantong, Jiangsu Province, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XZ ZW. Performed the experiments: XZ CY YZ SJ. Analyzed the data: XZ ZW KP. Contributed reagents/materials/analysis tools: XZ KP. Wrote the paper: XZ ZW KP.