About the Authors

Hao Peng

Contributed equally to this work with: Hao Peng, Hongmei Li

Affiliation Department of Epidemiology, School of Public Health, Medical College of Soochow University, Suzhou, China

Hongmei Li

Contributed equally to this work with: Hao Peng, Hongmei Li

Affiliation Department of Epidemiology, School of Public Health, Medical College of Soochow University, Suzhou, China

Chao Li

Affiliation Department of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, China

Xiangqin Chao

Affiliation Center for Disease Prevention and Control of Jinchang District, Suzhou, China

Qiu Zhang

Affiliation Center for Disease Prevention and Control of Jinchang District, Suzhou, China

Yonghong Zhang

yhzhang@suda.edu.cn

Affiliation Department of Epidemiology, School of Public Health, Medical College of Soochow University, Suzhou, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YZ HL. Performed the experiments: HP XC QZ. Analyzed the data: HP HL CL. Contributed reagents/materials/analysis tools: HL YZ. Wrote the paper: HP CL.