1 Department of Obstetrics and Gynecology, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, 170 Jomaru-ro, Wonmi-gu, Bucheon-si, Gyeonggi-do, 14584, Republic of Korea.
2 Department of Obstetrics and Gynecology, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, 170 Jomaru-ro, Wonmi-gu, Bucheon-si, Gyeonggi-do, 14584, Republic of Korea. hhl22@chol.com.
3 Department of Urology, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea.
4 Department of Pediatrics, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea.