About the Authors

Yang Shen

shenyang0924@sina.cn

Affiliation Department of Obstetrics and Gynecology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China

Qian Xu

Affiliations School of Public Health, Southeast University, Nanjing, China, Ministry of Education Key Laboratory of Environmental Medicine Engineering, Southeast University, Nanjing, China

Mulan Ren

Affiliation Department of Obstetrics and Gynecology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China

Xu Feng

Affiliation Department of Obstetrics and Gynecology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China

Yunlang Cai

Affiliation Department of Obstetrics and Gynecology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China

Yongxing Gao

Affiliation Department of Obstetrics and Gynecology, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YS QX MLR. Performed the experiments: YS QX MLR YLC XF YXG. Analyzed the data: QX XF. Contributed reagents/materials/analysis tools: YS QX. Wrote the paper: YS QX XF.