1. Department of Speech and Hearing Sciences, University of Washington, Seattle, WA;
2. Department of Veterans Affairs Puget Sound Health Care System, Seattle, WA;
3. Integrated Brain Imaging Center, University of Washington, Seattle, WA;
4. Department of Radiology, University of Washington, Seattle, WA;
5. Department of Neurology, University of Washington, Seattle, WA;
6. Department of Neurological Surgery, University of Washington, Seattle, WA