About the Authors

Wai Sze Paulin Ma

mawsp@hotmail.com

Affiliation Department of Obstetrics & Gynecology, Queen Mary Hospital, Hong Kong SAR, China

Ting Chung Pun

Affiliation Department of Obstetrics & Gynecology, Queen Mary Hospital, Hong Kong SAR, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WSPM TCP. Performed the experiments: WSPM. Analyzed the data: WSPM. Contributed reagents/materials/analysis tools: WSPM. Wrote the paper: WSPM TCP.