1. Department of Urology; Fujita Health University School of Medicine; Toyoake Aichi Japan
2. Department of Urology; Nagoya Memorial Hospital; Nagoya Aichi Japan
3. Department of Neurosurgery; Fujita Health University School of Medicine; Toyoake Aichi Japan
4. Division of Medical Statistics; Fujita Health University School of Medicine; Toyoake Aichi Japan
5. Department of Organ Transplant Surgery; Fujita Health University School of Medicine; Toyoake Aichi Japan