1. From the Department of Radiology (H.V.N., S.P.D., C.G.R.) and Department of Gastroenterology and Hepatology (A.S.), Thomas Jefferson University Hospital, 132 S 10th St, Philadelphia, PA 19123; Division of Gastroenterology and Hepatology, Rutgers-Robert Wood Johnson Medical School, New Brunswick, NJ (H.S.); and Department of Radiology, Westchester Medical Center, Valhalla, NY (C.V.).