1. Department of Bioethics and Humanities, School of Medicine, University of Washington, Seattle, Washington.
2. Department of Health Services, School of Public Health, University of Washington, Seattle, Washington.
3. Department of Family Medicine, University of Washington, Seattle, Washington.
4. Division of Gerontology and Geriatric Medicine, Department of Medicine, School of Medicine, University of Washington, Seattle, Washington.
5. Division of Pulmonary and Critical Care Medicine, Department of Medicine, School of Medicine, University of Washington, Seattle, Washington.