1. Department of Radiology, National Defense Medical College, Saitama, Japan
2. Department of Urology, National Defense Medical College, Saitama, Japan
3. Department of Basic Pathology, National Defense Medical College, Saitama, Japan
4. Division of Behavioral Science, National Defense Medical College Research Institute, Saitama, Japan
5. Department of Clinical Research Medicine, Teikyo University School of Medicine, Tokyo, Japan