1. Department of Health Management and Policy; The University of Tokyo; Tokyo; Japan
2. Department of Urology; Faculty of Medicine; The University of Tokyo; Tokyo; Japan
3. Department of Urology; Shintoshi Hospital; Iwata; Japan
4. Department of Medical Informatics and Economics; Graduate School of Medicine; The University of Tokyo; Tokyo; Japan
5. Department of Health Care Informatics; Tokyo Medical and Dental University; Tokyo; Japan