1. Department of Urology, College of Medicine, Bucheon St. Mary's Hospital, The Catholic University of Korea, Bucheon, Republic of Korea.
2. Department of Urology, College of Medicine, St. Vincent's Hospital, The Catholic University of Korea, Suwon, Republic of Korea.
3. Department of Laboratory Medicine, Chung-Ang University College of Medicine, Seoul, Republic of Korea.
4. Department of Obstetrics and Gynecology, College of Medicine, St. Vincent's Hospital, The Catholic University of Korea, Suwon, Republic of Korea.