1 Department of Radiology, University of Southern California, Keck School of Medicine, 1500 San Pablo Street, 2(nd) Floor, Los Angeles, California 90033.
2 Reno Radiological Associates, Reno, Nevada; Renown Regional Medical Center, Reno, Nevada; University of Nevada, Reno School of Medicine, Reno, Nevada.
3 Renown Regional Medical Center, Reno, Nevada; University of Nevada, Reno School of Medicine, Reno, Nevada; Acute Care Neurology Division, Renown Health, Reno, Nevada.