About the Authors

Rui Wang

Contributed equally to this work with: Rui Wang, Hong-Bin Wang

Affiliations Reproductive and Genetic Center of National Research Institute for Family Planning, Beijing, China, Graduate School, Peking Union Medical College, Beijing, China

Hong-Bin Wang

Contributed equally to this work with: Rui Wang, Hong-Bin Wang

Affiliation The Third Affiliated Hospital of Harbin Medical University, Harbin, China

Chan Juan Hao

Affiliations Reproductive and Genetic Center of National Research Institute for Family Planning, Beijing, China, Graduate School, Peking Union Medical College, Beijing, China

Yi Cui

Affiliations Reproductive and Genetic Center of National Research Institute for Family Planning, Beijing, China, Graduate School, Peking Union Medical College, Beijing, China

Xiao-Chen Han

Affiliation Tangshan People's Hospital, Tangshan, China

Yi Hu

Affiliations Reproductive and Genetic Center of National Research Institute for Family Planning, Beijing, China, Graduate School, Peking Union Medical College, Beijing, China

Fei-Feng Li

Affiliation The Third Affiliated Hospital of Harbin Medical University, Harbin, China

Hong-Fei Xia

hongfeixia@yahoo.com.cn (H-FX); genetic@263.net.cn (XM)

Affiliations Reproductive and Genetic Center of National Research Institute for Family Planning, Beijing, China, Graduate School, Peking Union Medical College, Beijing, China

Xu Ma

hongfeixia@yahoo.com.cn (H-FX); genetic@263.net.cn (XM)

Affiliations Reproductive and Genetic Center of National Research Institute for Family Planning, Beijing, China, Graduate School, Peking Union Medical College, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HFX XM RW. Performed the experiments: RW YH. Analyzed the data: RW CJH YC. Contributed reagents/materials/analysis tools: HBW FFL XCH. Wrote the paper: RW HFX. Final editing of the text: HFX XM.