1. Department of Obstetrics and Gynecology, Fertility Center of CHA Gangnam Medical Center, CHA University, Gangnam-gu, Seoul, Republic of Korea
2. Department of Obstetrics and Gynecology, Gil Hospital, Gachon University College of Medicine, Namdong-gu, Incheon, Republic of Korea
3. Department of Obstetrics and Gynecology, Severance Hospital, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Republic of Korea
4. Institute of Women’s Life Medical Science, Yonsei University College of Medicine, Seodaemun-gu, Seoul, Republic of Korea
5. Department of Obstetrics and Gynecology, Gangnam Severance Hospital, Yonsei University College of Medicine, Gangnam-gu, Seoul, Republic of Korea