[1] Harvard Med Sch, Massachusetts Gen Hosp, Dept Radiol, Athinoula A Martinos Ctr Biomed Imaging, 149 13th St, Charlestown, MA 02129 USA
[2] Univ Naples Parthenope, Naples, Italy
[3] Univ Duisburg Essen, Dept Radiol, Essen, Germany
[4] Univ Pisa, Dept Informat Engn, Pisa, Italy
[5] Harvard Med Sch, Massachusetts Gen Hosp, Dept Biostat, Boston, MA USA
[6] Harvard Med Sch, Beth Israel Deaconess Med Ctr, Div Gastroenterol Hepatol, Dept Med, Boston, MA USA
[7] Univ Duisburg Essen, Dept Nucl Med, Essen, Germany
[8] Tel Aviv Univ, Assuta Med Ctr, Sackler Sch Med, Tel Aviv, Israel
[9] Tel Aviv Univ, Rabin Med Ctr, Sackler Sch Med, Tel Aviv, Israel