About the Authors

Xuehui Liu

Contributed equally to this work with: Xuehui Liu, Longmei Tang

Affiliation Department of Occupational and Environmental Health, School of Public Health, Hebei Medical University, Zhongshan East Road 361, Shijiazhuang, 050017, Hebei, China

Longmei Tang

Contributed equally to this work with: Xuehui Liu, Longmei Tang

Affiliation Department of Epidemiology and Hygienic Statistics, School of Public Health, Hebei Medical University, Zhongshan East Road 361, Shijiazhuang, 050017, Hebei, China

Lixue Yang

Affiliation Department of Physical and Chemical Inspection, Shijiazhuang Center for Disease Control and Prevention, Likang Street 3, Shijiazhuang, 050011, Hebei, China

Xiaolin Zhang

Affiliation Department of Epidemiology and Hygienic Statistics, School of Public Health, Hebei Medical University, Zhongshan East Road 361, Shijiazhuang, 050017, Hebei, China

Liqin Wang

Affiliation Department of Epidemiology and Hygienic Statistics, School of Public Health, Hebei Medical University, Zhongshan East Road 361, Shijiazhuang, 050017, Hebei, China

Fengxue Yu

Affiliation Division of gastroenterology, The Second Hospital of Hebei Medical University, Heping West Road, Shijiazhuang, 050000, Hebei, China

Yi Liu

Affiliation Department of Toxicology, School of Public Health, Hebei Medical University, Zhongshan East Road 361, Shijiazhuang, 050017, Hebei, China

Qing Chen

Affiliation Department of Reproductive Medicine, First Affiliated Hospital of the Medical College, Xi'an Jiaotong University, Yanta West Road 76, Xi’an, 710061, Shanxi, China

Dianwu Liu

Dwliu1956@hotmail.com

Affiliation Department of Epidemiology and Hygienic Statistics, School of Public Health, Hebei Medical University, Zhongshan East Road 361, Shijiazhuang, 050017, Hebei, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XHL LMT DWL. Performed the experiments: XHL LMT LXY QC FXY YL. Analyzed the data: XLZ LQW. Contributed reagents/materials/analysis tools: LXY. Wrote the paper: XHL.