1. Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
2. Department of Obstetrics and Gynecology, Chungnam National University Hospital, Daejeon, Republic of Korea
3. Department of Computer Science and Engineering, Seoul National University, Seoul, Republic of Korea
4. Division of Biomedical Engineering, Hankuk University of Foreign Studies, Yongin, Republic of Korea
5. Department of Obstetrics and Gynecology, Institute of Women’s Life Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
6. Department of Obstetrics and Gynecology, Chonnam National University Medical School, Gwangju, Republic of Korea
7. Department of Obstetrics and Gynecology, Keimyung University Dongsan Medical Center, Daegu, Republic of Korea
8. Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
9. Department of Obstetrics and Gynecology, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Republic of Korea
10. Department of Obstetrics and Gynecology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Republic of Korea
11. Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Republic of Korea
12. Department of Obstetrics and Gynecology, CHA Gangnam Medical Center, CHA University School of Medicine, Seoul, Republic of Korea
13. Department of Obstetrics and Gynecology, College of Medicine, Seoul St. Mary’s Hospital, The Catholic University of Korea, Seoul, Republic of Korea
14. Department of Obstetrics and Gynecology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea