1 Division of Colorectal Surgery, Department of Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, South Korea.
2 Department of Obstetrics and Gynecology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea.
3 Department of Hospital Pathology, The Catholic University of Korea, College of Medicine, Seoul, South Korea.
4 Department of Obstetrics and Gynecology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, South Korea; Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, South Korea. Electronic address: orlando@catholic.ac.kr.