1. Department of Urology, Toyooka Hospital, Toyooka, Hyogo 668‑8501, Japan
2. Department of Diagnostic Pathology, Kochi Red Cross Hospital, Kochi 780‑8562, Japan
3. Department of Histopathology and Cytology, Japanese Red Cross Kyoto Daini Hospital, Kyoto 602‑8026, Japan
4. Department of Internal Medicine, Otokoyama Hospital, Yawata, Kyoto 614‑8366, Japan
5. Professor Emeritus, Kansai Medical University, Hirakata, Osaka 573‑1010, Japan
6. Department of Diagnostic Pathology, Toyooka Hospital, Toyooka, Hyogo 668‑8501, Japan