1. Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
2. Department of Neurosurgery, Stanford University School of Medicine, Stanford, California 94305, United States
3. Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California 94305, United States
4. Department of Biology, Stanford University, Stanford, California 94305, United States
5. Program in Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, California 94305, United States
6. Stanford Stroke Center, Stanford University School of Medicine, Stanford, California 94305, United States