1. Department of Urology, Bundang CHA Hospital, CHA Medical University College of Medicine, Seongnam, Korea
2. Department of Urology, Il-san CHA Hospital, CHA Medical University College of Medicine, Goyang, Korea
3. Department of Laboratory Medicine, Bundang CHA Hospital, CHA Medical University College of Medicine, Seongnam, Korea
4. Department of Physiology, CHA Medical University College of Medicine, Seongnam, Korea
5. Department of Male Infertility and Urology, Fertility Center of Bundang CHA Hospital, Seongnam, Korea