1. Department of Neurology, University of California, Los Angeles, CA 90095, USA.
2. Department of Radiology, University of California, Los Angeles, CA 90095, USA.
3. Interdepartmental Program in Neurosciences, University of California, Los Angeles, CA 90095, USA.
4. Department of Ophthalmology, University of California, Los Angeles, CA 90095, USA.
5. Department of Human Genetics, University of California, Los Angeles, CA 90095, USA.