1Department of Bioengineering & Therapeutic Sciences, University of California, San Francisco (UCSF), San Francisco, CA, United States, 2Department of Pathology, University of California, San Francisco (UCSF), San Francisco, CA, United States, 3Department of Radiology & Biomedical Imaging, University of California, San Francisco (UCSF), San Francisco, CA, United States, 4Department of Neurological Surgery, University of California, San Francisco (UCSF), San Francisco, CA, United States