1. Department of Physical Therapy and Rehabilitation Science, University of California, San Francisco, California, USA.
2. Department of Brain and Spinal Injury Center, University of California, San Francisco, California, USA.
3. Department of Pathology, University of California, San Francisco, California, USA.
4. Department of Biomedical Sciences, University of California, San Francisco, California, USA.
5. Fundación Ciencia & Vida, Santiago, Chile.
6. Department of Psychiatry, University of California, San Francisco, California, USA.
7. Department of Biochemistry and Biophysics, University of California, San Francisco, California, USA.
8. Howard Hughes Medical Institute, University of California, San Francisco, California, USA.
9. Department of Neurological Surgery, University of California, San Francisco, California, USA.
10. Weill Institute for Neuroscience, University of California, San Francisco, California, USA.
11. Kavli Institute of Fundamental Neuroscience, University of California, San Francisco, California, USA.