1. Department of Radiological Sciences, Oncology and Pathology, “Sapienza” University of Rome, I.C.O.T. Hospital, Latina, Italy.
2. Department of Radiological Sciences, Oncology and Pathology, “Sapienza” University of Rome, Sant'Andrea University Hospital, Rome, Italy.
3. Department of Radiology, Duke University Medical Center, Durham, NC.
4. Department of Radiology, Division of Abdominal Imaging, Stanford University School of Medicine, Stanford, CA.
5. Department of Radiology, University of Washington School of Medicine, 1959 NE Pacific St, Box 357115, Seattle, WA 98195.
6. Department of Radiology, University of Washington School of Medicine, Seattle Cancer Care Alliance, Seattle, WA.