1. Department of Obstetrics and Gynecology, Fertility Center of CHA Gangnam Medical Center, CHA University, Seoul 06135, Republic of Korea
2. Department of Obstetrics and Gynecology, CHA Bundang Medical Center, CHA University, Seongnam, Gyeonggi 13497, Republic of Korea
3. Department of Biomedical Science, College of Life Science, CHA University, Seongnam, Gyeonggi 13488, Republic of Korea