1. Departments of Neurology, Neurosurgery, and Pediatrics, Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA.
2. Graduate Program in Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA.
3. Graduate Program in Neuroscience, Stanford University School of Medicine, Stanford, CA 94305, USA.
4. Departments of Neurobiology and Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305, USA.
5. Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA.