1. Indiana University Melvin and Bren Simon Cancer Center, Indianapolis, Indiana 46202, USA
2. Veterans Affairs Medical Center and the Baylor College of Medicine, Houston, TX 77030, USA
3. Department of Genitourinary Medical Oncology, M.D. Anderson Cancer Center, Houston, TX 77030, USA
4. University of Miami Sylvester Comprehensive Cancer Center, Miami, FL 33136, USA
5. Texas Oncology and U.S. Oncology Research, Houston, TX 77060, USA