About the Authors

Chun-Fang Wang

Contributed equally to this work with: Chun-Fang Wang, Guo Zhang, Li-Jun Zhao

Affiliation Department of Obstetrics and Gynecology, Peking University People’s Hospital, Peking University, Beijing, China

Guo Zhang

Contributed equally to this work with: Chun-Fang Wang, Guo Zhang, Li-Jun Zhao

Affiliation Department of Obstetrics and Gynecology, Peking University People’s Hospital, Peking University, Beijing, China

Li-Jun Zhao

Contributed equally to this work with: Chun-Fang Wang, Guo Zhang, Li-Jun Zhao

Affiliation Department of Obstetrics and Gynecology, Peking University People’s Hospital, Peking University, Beijing, China

Wen-Juan Qi

Affiliation Department of Obstetrics and Gynecology, Peking University People’s Hospital, Peking University, Beijing, China

Xiao-Ping Li

Affiliation Department of Obstetrics and Gynecology, Peking University People’s Hospital, Peking University, Beijing, China

Jian-Liu Wang

Affiliation Department of Obstetrics and Gynecology, Peking University People’s Hospital, Peking University, Beijing, China

Li-Hui Wei

weilh@bjmu.edu.cn

Affiliation Department of Obstetrics and Gynecology, Peking University People’s Hospital, Peking University, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XL JW LW. Performed the experiments: CW GZ WQ. Analyzed the data: CW GZ LZ. Contributed reagents/materials/analysis tools: XL. Wrote the manuscript: CW GZ.