1. Northwest Network Mental Illness, Research, Education, and Clinical Center (MIRECC), Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA
2. Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA, USA
3. Geriatric Research, Education, and Clinical Center (GRECC), Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA
4. Department of Neurological Surgery, University of Washington, Seattle, WA, USA
5. Applied Physics Laboratory, University of Washington, Seattle, WA, USA
6. Department of Bioengineering, University of Washington, Seattle, WA, USA
7. Baker Engineering and Risk Consultants, San Antonio, TX, USA
8. Division of Gerontology and Geriatric Medicine, Department of Medicine, University of Washington, Seattle, WA, USA
9. Canadian Military and Veterans' Clinical Rehabilitation, Faculty of Rehabilitation Medicine, University of Alberta, AB, Canada
10. Pulmonary and Critical Care Medicine, Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA
11. Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Washington, Seattle, WA, USA
12. Department of Pharmacology, University of Washington School of Medicine, Seattle, WA, USA