1. From the Department of Diagnostic Imaging, Foothills Medical Centre, 1403 29 St NW, Calgary, AB, Canada T2N 2T9 (S.B., J.G., C.M., J.K.W., S.R.W.); and Departments of Medicine, Division of Gastroenterology and Hepatology (K.W.B., S.R.W.), and Radiology (J.K.W., S.R.W.), University of Calgary, Calgary, Alberta, Canada.