1. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Oregon Health & Science University (OHSU), Portland, Oregon, USA.
2. Center to Improve Veteran Involvement in Care, Veterans Affairs Portland Healthcare System, Portland, Oregon, USA.
3. Division of General Internal Medicine and Geriatrics, School of Medicine, OHSU, Portland, Oregon, USA.
4. Department of Veterans Affairs, Puget Sound Health Care System, Health Services Research & Development, Seattle, Washington, USA.
5. Department of Biobehavioral Nursing and Health Systems, University of Washington, School of Medicine, Seattle, Washington, USA.