About the Authors

Qinghua Ma

Contributed equally to this work with: Qinghua Ma, Wenxin Xu

Affiliations School of Public Health, Medical College of Soochow University, Suzhou, China, The 3rd People's Hospital of Xiangcheng District, Suzhou, China

Wenxin Xu

Contributed equally to this work with: Qinghua Ma, Wenxin Xu

Affiliation The 3rd People's Hospital of Xiangcheng District, Suzhou, China

Xiaohua Zhou

Affiliation The 3rd People's Hospital of Xiangcheng District, Suzhou, China

Chunxue Cui

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

Chen-Wei Pan

pcwonly@gmail.com

Affiliation 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: QM WX CWP. Performed the experiments: QM WX XZ. Analyzed the data: CC CWP. Contributed reagents/materials/analysis tools: CWP. Wrote the paper: QM CWP.