1. Institute of Convergence Medicine Research, Ewha Womans University Mokdong Hospital, College of Medicine, Ewha Womans University, Seoul 07985, Republic of Korea
2. Department of Surgery, Ewha Womans University Mokdong Hospital, College of Medicine, Ewha Womans University, Seoul 07985, Republic of Korea
3. Department of Obstetrics and Gynecology, Ewha Medical Institute, College of Medicine, Ewha Womans University, Seoul 07804, Republic of Korea