1. Department of Pediatrics, Division of Child Neurology, Doernbecher Children's Hospital, Department of Emergency Medicine, Oregon Health & Science University, Portland, Oregon, USA.
2. Layton Aging and Alzheimer's Disease Center, Neurology, Department of Emergency Medicine, Oregon Health & Science University, Portland, Oregon, USA.
3. Advanced Imaging Research Center, Department of Emergency Medicine, Oregon Health & Science University, Portland, Oregon, USA.
4. Center for Policy and Research in Emergency Medicine, Department of Emergency Medicine, Oregon Health & Science University, Portland, Oregon, USA.
5. Portland Veterans Affairs Medical Center, Neurology, Portland, Oregon, USA.
6. Veterans Affairs Northwest Network Mental Illness, Research, Education, and Clinical Center, Veterans Affairs Puget Sound Health Care System, Seattle, Washington, USA.
7. Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, Seattle, Washington, USA.
8. Department of Radiology, University of Washington School of Medicine, Seattle, Washington, USA.
9. Department of Neurology, University of Washington School of Medicine, Seattle, Washington, USA.