1. Department of Urology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
2. Department of Medical Information Science, Kyushu University Hospital, Fukuoka, Japan
3. Department of Urology, Kyoto University Graduate School of Medicine, Kyoto, Japan
4. Department of Urology, Keio University School of Medicine, Tokyo, Japan
5. Department of Pathology, Mie University School of Medicine, Mie, Japan