1. Department of Urology, Fujita‑Health University, School of Medicine, Toyoake, Aichi 470‑1192, Japan
2. Department of Nephrourology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8602, Japan
3. Department of Urology, Gifu University Graduate School of Medicine, Gifu, Gifu 501‑1194, Japan
4. Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka 431‑3192, Japan