1. Department of Neurology and Seattle Parkinson Disease Research Education and Clinical Center (Seattle PADRECC), VA Puget Sound Health Care System, USA
2. Geriatrics and Extended Care, VA Puget Sound Health Care System, Seattle, Washington, USA
3. Portland Parkinson Disease Research Education and Clinical Center (Portland PADRECC), Portland VA Medical Center, Portland, Oregon, USA
4. Clinical Informatics, VA Puget Sound Health Care System, Seattle, Washington, USA