1. Department of Urology, Gyeongsang National University College of Medicine, and lnstitute of Health Sciences of Gyeongsang National University, Jinju, Korea.
2. Department of Urology, Gyeongsang National University Changwon Hospital, Changwon, Korea.
3. Department of Urology, Jeonbuk National University Medical School, Jeonju, Korea.
4. Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea.