1. Department of Neurology, University of Southern California, Los Angeles (A.T.).
2. Los Angeles County-Department of Health Services, Los Angeles, CA (A.T.).
3. Office of Global Health and Health Disparities (R.T.B.), National Institute of Neurological Disorders and Stroke, Bethesda, MD.
4. Northern California Institute for Research and Education, San Francisco, CA (R.T.).
5. Division of Clinical Research (C.S.M., C.B.W.), National Institute of Neurological Disorders and Stroke, Bethesda, MD.
6. Department of Neurology, University of California, San Francisco, CA (B.O.).