1. Department of Radiology, Thomas Jefferson UniversityPhiladelphia PA
2. BCLC Group, Hospital Clinic, University of Barcelona, Institut d'Investigacions Biome'diques August Pi i SunyerBarcelona Spain
3. Department of MedicineUniversity of Toronto and University Health NetworkToronto Ontario Canada
4. Liver Imaging Group, Deptartment of RadiologyUniversity of California at San DiegoSan Diego CA