1. Department of Obstetrics and Gynecology, Seoul National University Bundang Hospital, Seongnam 13620, Republic of Korea
2. Department of Obstetrics and Gynecology, Galilee Medical Center, Nahariya 22100, Israel
3. Azrieli Faculty of Medicine, Bar Ilan University, Safed 5290002, Israel
4. Department of Pathology, Seoul National University Bundang Hospital and College of Medicine, Seoul National University, Seongnam 13620, Republic of Korea
5. Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul 03080, Republic of Korea