1. Department of Urology, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
2. Department of Urology, Hamamatsu University School of Medicine, Hamamatsu, Japan
3. Department of Urology, Fujita Health University School of Medicine, Toyoake, Japan
4. Department of Nephrourology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan