1. Department of Neurology and Neurological Sciences, Stanford University, School of Medicine, 300 Pasteur Dr, MC5778 Stanford Stroke Center, Stanford, CA 94305-5778, USA
2. Department of Biomedical Engineering, The University of Arizona, Tucson, AZ, USA
3. Departments of Neuroscience GIDP, Materials Science and Engineering, BIO5 Institute, The University of Arizona, Tucson, AZ, USA
4. Department of Electrical Engineering, Stanford University, Stanford, CA, USA
5. Stanford Stroke Center and Stanford University School of Medicine, Stanford, CA, USA