About the Authors

Ronald T. K. Pang

Contributed equally to this work with: Ronald T. K. Pang, Wei-Min Liu

Affiliations Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China, Centre for Reproduction, Development and Growth, The University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China

Wei-Min Liu

Contributed equally to this work with: Ronald T. K. Pang, Wei-Min Liu

Affiliations Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China, Centre for Reproduction, Development and Growth, The University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China

Carmen O. N. Leung

Affiliation Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China

Tian-Min Ye

Affiliation Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China

Peter C. K. Kwan

Affiliation Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China

Kai-Fai Lee

Affiliations Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China, Centre for Reproduction, Development and Growth, The University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China

William S. B. Yeung

wsbyeung@hku.hk

Affiliations Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China, Centre for Reproduction, Development and Growth, The University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Performed the experiments: RTKP W-ML CONL T-MY PCKK. Analyzed the data: RTKP W-ML K-FL WSBY. Wrote the paper: RTKP W-ML K-FL WSBY.