1. Department of Urology, Kanto Rosai Hospital, 1-1 Kizukisumiyoshi-cho, Nakahara-ku, Kawasaki 211-8510, Japan
2. Department of Pathology, Kanto Rosai Hospital, Kawasaki 211-8510, Japan
3. Department of Anesthesiology, Kanto Rosai Hospital, Kawasaki 211-8510, Japan