About the Authors

Jae Eun Shin

Affiliation Department of Obstetrics and Gynecology, College of Medicine, the Catholic University of Korea, Seoul, Korea

Young Lee

Affiliation Department of Obstetrics and Gynecology, College of Medicine, the Catholic University of Korea, Seoul, Korea

Sa Jin Kim

Affiliation Department of Obstetrics and Gynecology, College of Medicine, the Catholic University of Korea, Seoul, Korea

Jong Chul Shin

jcshin@catholic.ac.kr

Affiliation Department of Obstetrics and Gynecology, College of Medicine, the Catholic University of Korea, Seoul, Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JCS JES. Performed the experiments: JES. Analyzed the data: JES SJK. Contributed reagents/materials/analysis tools: JES YL. Wrote the paper: JES.