1. Institute for Neurodegenerative Diseases, University of California, San Francisco, CA 94143, USA.
2. Department of Neurology, University of California, San Francisco, CA 94143, USA.
3. Department of Cellular and Molecular Pharmacology, University of California, San Francisco, CA 94143, USA.
4. Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94143, USA.
5. Department of Pathology, University of California, San Francisco, CA 94143, USA.