1. Department of Urology, Soonchunhyang University School of Medicine, Seoul 04401, Republic of Korea
2. Department of Urology, Soonchunhyang University School of Medicine, Cheonan 31151, Republic of Korea
3. Program in Biomedical Sciences & Engineering, Department of Biomedical Sciences, College of Medicine, Inha University, Incheon 22212, Republic of Korea