1. Department of Physiology, Keimyung University School of Medicine, Daegu, Korea.
2. Department of Urology, Kyungpook National University School of Medicine, Daegu, Korea.
3. Department of Urology, Yeungnam University College of Medicine, Daegu, Korea.
4. Department of Biomedical Science, Catholic University of Daegu, Gyeongsan, Korea.
5. BioMedical Research Institute, Kyungpook National University Hospital, Daegu, Korea.