1. Department of Urology Kitasato University School of Medicine Sagamihara Japan
2. Department of Urology Kitasato University Medical Center Kitamoto Japan
3. Department of Urology Kanagawa Prefectural Federation of Agricultural Cooperatives for Health and Welfare Sagamihara Kyodo Hospital Sagamihara Japan
4. Department of Urology Higashiyamato Hospital Higashiyamato Japan
5. Department of Urology National Hospital Organization Sagamihara Hospital Sagamihara Japan
6. Department of Urology Kitasato University Kitasato Institute Hospital Tokyo Japan