About the Authors

Seung Joo Chon

Affiliations Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea

Yun Rak Choi

Affiliation Department of Orthopaedic Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea

Yun Ho Roh

Affiliation Department of Biostatistics Collaboration, Yonsei University College of Medicine, Seoul, Republic of Korea

Bo Hyon Yun

Affiliations Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea

SiHyun Cho

Affiliations Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea

Young Sik Choi

Affiliations Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea

Byung Seok Lee

Affiliations Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea, Institute of Women's Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea

Seok Kyo Seo

TUDEOLSEO@yuhs.ac

Affiliations Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea, Institute of Women's Life Medical Science, Yonsei 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: SJC SKS. Performed the experiments: SJC SKS BHY BSL. Analyzed the data: SJC SKS YHR. Contributed reagents/materials/analysis tools: SJC SKS YRC SHC YSC. Wrote the paper: SJC SKS.