1. Department of Obstetrics and Gynecology, CHA Gangnam Medical Center, CHA University, Seoul, Korea.
2. Department of Psychiatry, Myongji Hospital, Hanyang University College of Medicine, Goyang, Korea.
3. Division of Biostatistics, Department of Biomedical Systems Informatics, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Obstetrics and Gynecology, Ajou University School of Medicine, Suwon, Korea.
5. Department of Obstetrics and Gynecology, Gangseo MizMedi Hospital, Seoul, Korea.
6. Department of Obstetrics and Gynecology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
7. Smart MEC Healthcare R&D Center, CHA Future Medicine Research Institute, CHA Bundang Medical Center, Seongnam, Korea.
8. Department of Obstetrics and Gynecology, CHA Bundang Medical Center, CHA University, Seongnam, Korea.