1. Department of Radiology, Neuroradiology Section, Stanford University Medical Center, 300 Pasteur Dr, Grant S047, Palo Alto, CA 94305-5105.
2. Diagnostic Imaging, Sutter Health, Sacramento, CA.
3. Department of Radiology, School of Medicine, University of California Davis, Sacramento, CA.
4. Department of Radiology, Duke University Medical Center, Durham, NC.