1. Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA 94143, USA
2. RadNet Northern California, RadNet Imaging Centers, San Francisco, CA 90815, USA
3. Southwest Medical Imaging, Scottsdale, AZ 85258, USA
4. Department of Neurological Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI 53705, USA
5. Department of Neurology, Geisel School of Medicine at Dartmouth, Hanover, NH 03755, USA
6. Department of Neurology, UCSF Weill Institute for Neurosciences, San Francisco, CA 94143, USA