1. Abdominal Imaging, Clinical Radiology, University of California, Irvine, Orange CA, USA
2. Abdominal Imaging, Department of Radiology, University of Cincinnati Medical Center, Cincinnati, OH, USA
3. Department of Medicine, University of California, Irvine, Orange, CA, USA
4. Department of Radiology, University of Washington and VA Puget Sound Health Care System, Seattle, WA, USA