1. Division of Urology, Department of Surgery, American University of Beirut Medical Center, Beirut, Lebanon
2. Department of Radiology Oncology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
3. Division of Urology, Department of Surgery, American University of Beirut Medical Center, PO Box 11-0236, Riad El Solh, Beirut 1107 2020, Lebanon