About the Authors

Jeong In Choi

Affiliation Department of Obstetrics and Gynecology, Bucheon St. Mary’s Hospital, College of Medicine, Catholic University of Korea, Seoul, Republic of Korea

Sang Hi Park

Affiliation Clinical Medicine Research Institute, Bucheon St. Mary’s Hospital, College of Medicine, Catholic University of Korea, Seoul, Republic of Korea

Hee-Jin Lee

Affiliation Clinical Medicine Research Institute, Bucheon St. Mary’s Hospital, College of Medicine, Catholic University of Korea, Seoul, Republic of Korea

Dae Woo Lee

Affiliation Department of Obstetrics and Gynecology, Bucheon St. Mary’s Hospital, College of Medicine, Catholic University of Korea, Seoul, Republic of Korea

Hae Nam Lee

leehaenam@catholic.ac.kr

Affiliation Department of Obstetrics and Gynecology, Bucheon St. Mary’s Hospital, College of Medicine, Catholic University of Korea, Seoul, Republic of Korea

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HNL. Performed the experiments: SHP HJL HNL. Analyzed the data: JIC SHP HJL DWL HNL. Contributed reagents/materials/analysis tools: SHP HJL DWL HNL. Wrote the paper: JIC HNL.