1. Duke Prostate Center, Division of Urologic Surgery, Duke University Medical Center, Durham, North Carolina
2. Section of Urology, Department of Surgery, Durham Veterans Affairs Medical Center, Durham, North Carolina
3. Robert Preston Tisch Brain Tumor Center, Duke University Medical Center, Durham, North Carolina
4. JLC-Biomedical/Biotechnology Research Institute, Cancer Research Program, North Carolina Central University, Durham, North Carolina
5. Department of Surgery, Department of Community and Family Medicine, Duke University Medical Center, Durham, North Carolina
6. Department of Pathology, Duke University Medical Center, Durham, North Carolina