1. Department of Neuroscience, Brown University, Providence, RI 02912, USA.
2. Center for Neurorestoration and Neurotechnology, Rehabilitation R&D Service, Department of Veterans Affairs Medical Center, Providence, RI 02908, USA.
3. Brown Institute for Brain Science, Brown University, Providence, RI 02912, USA.
4. School of Engineering, Brown University, Providence, RI 02912, USA.
5. Department of Neurology, Massachusetts General Hospital, Boston, MA 02114, USA.
6. Department of Neurosurgery, Stanford University, Stanford, CA 94305, USA.
7. Stanford Neurosciences Institute, Stanford University, Stanford, CA 94305, USA.
8. Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA.
9. Department of Neurology, Harvard Medical School, Boston, MA 02115, USA.
10. Neurosurgery, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02115, USA.
11. Neurosurgery, Rhode Island Hospital, Providence, RI 02903, USA.
12. Department of Neurobiology, Stanford University, Stanford, CA 94305, USA.
13. Department of Bioengineering, Stanford University, Stanford, CA 94305, USA.
14. Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305, USA.