1. Department of Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo 135-8550, Japan
2. Department of Pathology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo 135-8550, Japan
3. Department of Genitourinary Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo 135-8550, Japan
4. Division of Pathology, The Cancer Institute of Japanese Foundation for Cancer Research, Tokyo 135-8550, Japan