1. Department of Radiology, Vancouver General Hospital, University of British Columbia, 3350-950 W 10th Ave, Vancouver, BC V5Z 1M9, Canada.
2. Department of Radiology, University of Calgary, Calgary, AB, Canada.
3. Abdominal Imaging Section, Medical Imaging Department, King Saud bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center, Ministry of the National Guard, Health Affairs, Riyadh, Saudi Arabia.