1. Division of Geriatric Medicine and Gerontology, Department of Medicine, and
2. Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
3. Department of Occupational Therapy
4. Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom
5. Division of General Internal Medicine, Department of Medicine
6. Clinical Research, Investigation, and Systems Modeling of Acute illness (CRISMA) Center, Department of Critical Care Medicine, and
7. Department of Psychiatry, University of Pittsburgh, Pittsburgh, Pennsylvania; and