1 Keck School of Medicine, University of Southern California (USC), Los Angeles, California.
2 Department of Radiological Sciences, David Geffen School of Medicine, University of California at Los Angeles (UCLA), Los Angeles, California.
3 Division of Emergency Radiology, Department of Radiology, Keck School of Medicine, University of Sothern California (USC), Los Angeles, California.
4 Keck School of Medicine, University of Sothern California (USC), 1500 San Pablo Street, Los Angeles, CA 90033. Electronic address: ali.gholamrezanezhad@med.usc.edu.