1. Department of Obstetrics and Gynecology Kyung Hee University Hospital at Gangdong Seoul Republic of Korea
2. Bioinformatics Collaboration Unit Yonsei University College of Medicine Seoul Republic of Korea
3. Department of Obstetrics and Gynecology, Gangnam Severance Hospital Yonsei University College of Medicine Seoul Republic of Korea
4. Weill Cornell Medical College New York NY USA
5. Department of Obstetrics and Gynecology Yonsei University College of Medicine Seoul Republic of Korea
6. Institute of Women's Life Medical Science Yonsei University College of Medicine Seoul Republic of Korea