1. Unit of Internal Medicine, Dpt of Medical and Surgical Sciences, University of Bologna, S.Orsola-Malpighi hospital, Bologna, Italy
2. Radiology and Medicine, Division of Gastroenterology, University of Calgary, Canada
3. Department of radiology, Thomas Jefferson University Hospitals, Philadelphia, United States
4. Clinical Sciences, Imperial College, London, United Kingdom of Great Britain and Northern Ireland
5. Unit of Internal Medicine 2, Caritas-Krankenhaus, Bad Mergentheim, Germany
6. Department of Medical Imaging, University of Toronto, Canada
7. Department of Radiology, Stanford University, Stanford, United States
8. Liver Imaging Grup, Department of Radiology, University of California, San Diego, United States
9. Department of Medicine and Radiology, University of California, San Diego, United States