1. Department of Urology, Keio University School of Medicine, Tokyo, Japan
2. Department of Urology, Tokyo Dental College, Ichikawa General Hospital, Chiba, Japan
3. Department of Urology, Isehara Kyodo Hospital, Kanagawa, Japan
4. Department of Preventive Medicine and Public Health, Biostatistics Unit at Clinical Translational Research Center, Keio University School of Medicine, Tokyo, Japan
5. Division of Diagnostic Pathology, Keio University School of Medicine, Tokyo, Japan