1. Department of Urology; Graduate School of Medicine; The University of Tokyo; Tokyo Japan
2. Department of Cellular and Organ Pathology; Graduate School of Medicine; Akita University; Akita Japan
3. Department of Pathology; Graduate School of Medicine; The University of Tokyo; Tokyo Japan
4. Department of Urology; Mitsui Memorial Hospital; Tokyo Japan
5. Department of Urology; Japanese Red Cross Medical Center; Tokyo Japan
6. Department of Continence Medicine; Graduate School of Medicine; The University of Tokyo; Tokyo Japan