1. Department of Medicine, Duke University, Durham, North Carolina
2. Duke-Margolis Center for Health Policy, Duke University, Durham, North Carolina
3. Department of Population Health Sciences, Duke University, Durham, North Carolina
4. Social Science Research Institute, Duke University, Durham, North Carolina
5. School of Nursing, Duke University, Durham, North Carolina
6. School of Medicine, University of Washington, Seattle
7. Department of Medicine, University of North Carolina, Chapel Hill
8. Department of Medicine, Oregon Health and Science University, Portland
9. Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
10. Department of Medicine, University of Pennsylvania, Philadelphia
11. Geriatrics Research Education and Clinical Center (GRECC), Durham Veterans Affairs Healthcare System, Durham, North Carolina