About the Authors

Yanhong Gong

Contributed equally to this work with: Yanhong Gong, Xiaoxv Yin

Affiliation Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P. R. China

Xiaoxv Yin

Contributed equally to this work with: Yanhong Gong, Xiaoxv Yin

Affiliation Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P. R. China

Yunxia Wang

Affiliation Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P. R. China

Yongbin Li

Affiliation Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P. R. China

Geng Qin

Affiliation Department of Maternal and Child Health Care and Community Health, National Health and Family Planning Commisson of the People's Republic of China, Beijing, P. R. China

Liqun Liu

Affiliation Department of Maternal and Child Health Care and Community Health, National Health and Family Planning Commisson of the People's Republic of China, Beijing, P. R. China

Wei Zhou

Affiliation Department of Maternal and Child Health Care and Community Health, National Health and Family Planning Commisson of the People's Republic of China, Beijing, P. R. China

Fujian Song

Affiliation Norwich Medical School, Faculty of Medicine and Health Science, University of East Anglia, Norwich, United Kingdom

Xiaoxin Dong

Affiliation Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P. R. China

Shiyi Cao

Affiliation Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P. R. China

Chen Yang

Affiliation Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P. R. China

Huajie Yang

Affiliation Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P. R. China

Jun Xie

Affiliation Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P. R. China

Junan Liu

zuxunlu@yahoo.com (ZL); lja10_11@163.com (JL)

Affiliation Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P. R. China

Zuxun Lu

zuxunlu@yahoo.com (ZL); lja10_11@163.com (JL)

Affiliation Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P. R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YW YL GQ LL WZ JL ZL. Performed the experiments: YW YL GQ LL WZ XD SC CY HY JX. Analyzed the data: YG XY FS XD SC CY HY JX. Contributed reagents/materials/analysis tools: YG XY FS JL ZL. Wrote the paper: YG XY FS.