[1] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Dept Radiol,Div Abdominal Imaging & Intervent, Boston, MA 02114 USA
[2] NYU, Dept Radiol, Div Abdominal Imaging, Langone Med Ctr, New York, NY 10016 USA
[3] Mayo Clin, Dept Radiol, Div Abdominal Imaging, Rochester, MN USA
[4] Mayo Clin, Dept Med, Div Gastroenterol, Rochester, MN USA
[5] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Dept Surg,Div Pancreat Surg, Boston, MA 02114 USA