Affiliation: | 1. Boston Medical Center, , Boston, Massachusetts;2. School of Medicine, Boston University, , Boston, Massachusetts;3. New Courtland Center for Transitions and Health, University of Pennsylvania, , Philadelphia, Pennsylvania;4. School of Nursing, University of Pennsylvania, , Philadelphia, Pennsylvania;5. Institute on Aging, University of Pennsylvania, , Philadelphia, Pennsylvania;6. Leonard Davis Institute of Health Economics, University of Pennsylvania, , Philadelphia, Pennsylvania |