1. Division of Urology, Department of Surgery, Georgia Regents University, Augusta, GA 30912, USA
2. Division of Hematology and Oncology, Department of Medicine, Georgia Regents University, Augusta, GA 30912, USA
3. Department of Pathology, Georgia Regents University, Augusta, GA 30912, USA
4. Department of Urologic Surgery, Vanderbilt University Medical Center, MCN, A-1302, Nashville, TN 37232, USA