1. Department of Urology, Soonchunhyang University Cheonan Hospital, Soonchunhyang University College of Medicine, Cheonan, Korea.
2. Department of Health and Medical Informatics, Kyungnam University College of Health Sciences, Changwon, Korea.
3. Evidence Based Research Center, Kyungnam University, Changwon, Korea.
4. Department of Urology, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.