1. Department of Urology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea.
2. Department of Urology, CHA Ilsan Medical Center, CHA University School of Medicine, Goyang, Korea.
3. Department of Obstetrics and Gynecology, Fertility Center of CHA Bundang Medical Center, Seongnam, Korea.
4. Department of Physiology, CHA University School of Medicine, Seongnam, Korea.