1 Division of Geriatrics, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA.
2 Duke Population Health Management Office, Duke University Health System, Durham, North Carolina, USA.
3 Duke University Hospital Medicine Program, Division of General Internal Medicine, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA.
4 Duke Office of Clinical Research, Duke University School of Medicine, Durham, North Carolina, USA.