1. Department of Radiology, Keck School of Medicine, University of Southern California, 2nd Fl, Imaging, 1500 San Pablo St, Los Angeles, CA 90033.
2. Keck School of Medicine, University of Southern California, Los Angeles, CA.
3. Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA.
4. Department of Medicine, Division of Gastrointestinal and Liver Diseases, Keck School of Medicine, University of Southern California, Los Angeles, CA.