1. Division of General Internal Medicine University of Washington Seattle Washington USA
2. Division of General Internal Medicine and Geriatrics Oregon Health and Science University Portland Oregon USA
3. Department of Health Services, Policy, and Practice, Center for Gerontology and Healthcare Research, School of Public Health Brown University Providence Rhode Island USA
4. Providence Veterans Administration Medical Center Center of Innovation in Health Services Research and Development Service Providence Rhode Island USA
5. Division of Pulmonary and Critical Care Medicine Oregon Health and Science University Portland Oregon USA
6. Health Services Research and Development Veterans Affairs Portland Health Care System Portland Oregon USA