1. Department of Urology, Soonchunhyang University, College of Medicine, Bucheon, Korea.
2. Department of Obstetrics and Gynecology, Soonchunhyang University, College of Medicine, Bucheon, Korea.
3. Department of Nephrology, Yale University, School of Medicine, New Haven, USA.
4. Department of Cellular and Molecular Physiology, Yale University, School of Medicine, New Haven, USA.