About the Authors

Xiaohong Pan

Contributed equally to this work with: Xiaohong Pan, Yingying Zhu

Affiliation Zhejiang Province Center for Disease Control and Prevention, Hangzhou, Zhejiang, China

Yingying Zhu

Contributed equally to this work with: Xiaohong Pan, Yingying Zhu

Affiliation Department of Epidemiology & Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China

Qing Wang

Affiliation Department of Epidemiology & Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China

Hui Zheng

Affiliation Department of Epidemiology & Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China

Xin Chen

Affiliation Department of Epidemiology & Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China

Jing Su

Affiliation Department of Epidemiology & Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China

Zhihang Peng

zhihangpeng@yahoo.com.cn

Affiliation Department of Epidemiology & Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China

Rongbin Yu

Affiliation Department of Epidemiology & Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China

Ning Wang

Affiliation National Center for AIDS/STD Control and Prevention, Chinese 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: ZP RY NW. Performed the experiments: XP. Analyzed the data: YZ QW. Contributed reagents/materials/analysis tools: XC HZ JS. Wrote the paper: YZ ZP.