1. Department of Urology, San Francisco Veterans Affairs Medical Center and University of California-San Francisco, San Francisco, California
2. Department of Oncology and Laboratory Medicine, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
3. Department of Urology, Toho University Faculty of Medicine, Tokyo, Japan
4. Department of Pathology, San Francisco Veterans Affairs Medical Center and University of California-San Francisco, San Francisco, California