1. University of North Carolina Lineberger Comprehensive Cancer Center; USA
2. Department of Urology; University of North Carolina School of Medicine; USA
3. Department of Epidemiology; University of North Carolina Gillings School of Global Public Health; Chapel Hill NC USA
4. American College of Surgeons; National Cancer Data Base; Chicago IL USA
5. Division of General Medicine and Clinical Epidemiology; University of North Carolina School of Medicine; USA
6. Division of Hematology and Oncology; University of North Carolina School of Medicine; USA