1 Department of Obstetrics and Gynecology, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea.
2 Department of Obstetrics and Gynecology, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea. Electronic address: hhl22@chol.com.
3 Department of Urology, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea.
4 Department of Interdisciplinary Program in Biomedical Science, Soonchunhyang University, Asan, Republic of Korea..