1. Department of Urology, University of California-Irvine, Orange, California
2. Department of Urology, University of Texas M.D. Anderson Cancer Center, Houston, Texas
3. Department of Urology, Yale School of Medicine, New Haven, Connecticut
4. Department of Pathology, University of Texas M.D. Anderson Cancer Center, Houston, Texas
5. Department of Biostatistics, University of Texas M.D. Anderson Cancer Center, Houston, Texas