1. Division of Urology, Department of Surgery, American University of Beirut Medical Center, Beirut, Lebanon
2. Department of Internal Medicine, American University of Beirut Medical Center, Beirut, Lebanon
3. Clinical Research Institute, American University of Beirut, Beirut, Lebanon
4. Division of Urology, Department of Surgery, American University of Beirut Medical Center, P.O. Box 11-0236, Riad El-Solh, 1107 2020 Beirut, Lebanon