1. Department of Radiology, Al-Wakra Hospital, Hamad Medical Corporation, PO Box 82228, Doha, Qatar.
2. Department of Radiology, Weill Cornell Medical College, Doha, Qatar.
3. Department of Radiology, University of Trieste, Trieste, Italy.
4. Department of Urology, Al-Wakra Hospital, Hamad Medical Corporation, Doha, Qatar.
5. Department of Urology, Weill Cornell Medical College, Doha, Qatar.
6. Department of Imaging Science, University of Rochester Medical Center, Rochester, NY.
7. Department of Radiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA.
8. Department of Surgery, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA.