1. Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
2. Department of Anatomy, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
3. Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
4. Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea