About the Authors

Seung Mi Lee

Affiliations Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Republic of Korea, Department of Obstetrics and Gynecology, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Republic of Korea

Jeong Woo Park

Affiliation Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Republic of Korea

Chan-Wook Park

Affiliation Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Republic of Korea

Bo Hyun Yoon

yoonbh@snu.ac.kr

Affiliation Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Republic of Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SML CWP BHY. Performed the experiments: SML BHY. Analyzed the data: SML JWP BHY. Wrote the paper: SML JWP CWP BHY.