1. Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
2. Bundang Cheil Women’s Hospital, Seongnam, Korea.
3. Institute of Women’s Life Medical Science, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
5. Seoul Clinical Laboratories Healthcare Co., Ltd., Yongin, Korea.