About the Authors

Zhonghai Zhu

Contributed equally to this work with: Zhonghai Zhu, Yue Cheng

Affiliation Department of Epidemiology and Biostatistics, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, P.R. China

Yue Cheng

Contributed equally to this work with: Zhonghai Zhu, Yue Cheng

Affiliation Department of Nutrition and Food Safety Research, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, P.R. China

Wenfang Yang

Affiliation Department of Maternal and Child Health Center, the First Affiliated Hospital, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, P.R. China

Danyang Li

Affiliation Department of Epidemiology and Biostatistics, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, P.R. China

Xue Yang

Affiliation Department of Epidemiology and Biostatistics, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, P.R. China

Danli Liu

Affiliation Department of Epidemiology and Biostatistics, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, P.R. China

Min Zhang

Affiliation Department of Epidemiology and Biostatistics, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, P.R. China

Hong Yan

Affiliation Department of Epidemiology and Biostatistics, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, P.R. China

Lingxia Zeng

tjzlx@mail.xjtu.edu.cn

Affiliation Department of Epidemiology and Biostatistics, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, P.R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ZZ YC WY DYL XY DLL MZ HY LZ. Performed the experiments: ZZ YC WY DYL XY DLL MZ HY LZ. Analyzed the data: ZZ YC WY DYL XY DLL MZ HY LZ. Contributed reagents/materials/analysis tools: ZZ YC WY DYL XY DLL MZ HY LZ. Wrote the paper: ZZ YC WY DYL XY DLL MZ HY LZ.