1 Division of Geriatric Medicine, Department of Medicine, University of North Carolina at Chapel Hill, School of Medicine, Chapel Hill, North Carolina, USA.
2 UNC Center for Aging and Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
3 Division of Pharmaceutical Outcomes and Policy, University of North Carolina at Chapel Hill, Eshelman School of Pharmacy, Chapel Hill, North Carolina, USA.
4 Center for Health Equity Research and Promotion, Veterans Affairs (VA) Pittsburgh Healthcare System, Pittsburgh, Pennsylvania, USA.
5 RAND Corporation, Pittsburgh, Pennsylvania, USA.
6 Section of Palliative Care and Medical Ethics, Division of General Internal Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
7 Hebrew SeniorLife, Hinda and Arthur Marcus Institute for Aging Research, Boston, Massachusetts, USA.
8 Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.