1. Gladstone Institute of Neurological Disease, Gladstone Institutes, San Francisco, CA 94158, USA.
2. Graduate Program in Neuroscience, University of California, San Francisco, San Francisco, CA 94158, USA.
3. Electron Microscope Laboratory, University of California, Berkeley, Berkeley, CA 94720, USA.
4. Department of Pathology, University of California, San Francisco, San Francisco, CA 94143, USA.
5. Graduate Program in Biomedical Sciences, University of California, San Francisco, San Francisco, CA 94143, USA.
6. Department of Cell Biology, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA.
7. Center for Systems and Therapeutics, Gladstone Institutes, University of California, San Francisco, San Francisco, CA 94158, USA.
8. Department of Neurology, University of California, San Francisco, San Francisco, CA 94158, USA.
9. Department of Physiology, University of California, San Francisco, San Francisco, CA 94158, USA.