1 Department of Anesthesiology, Emory University School of Medicine, Atlanta, Georgia, USA.
2 Emory Critical Care Center, Emory University School of Medicine, Atlanta, Georgia, USA.
3 Department of Geriatrics and Extended Care, Atlanta VA Medical Center, Decatur, Georgia, USA.
4 Division of Palliative Medicine, Department of Family and Preventive Medicine, Emory University, Atlanta, Georgia, USA.
5 Department of Anesthesiology, University of Vermont Larner College of Medicine, Burlington, Vermont, USA.
6 Division of Geriatric Medicine and Palliative Care Program, Department of Medicine, University of North Carolina-Chapel Hill School of Medicine, Chapel Hill, North Carolina, USA.
7 Division of General Internal Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA.
8 Division of Geriatrics and Gerontology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA.
9 Department of Veterans Affairs Birmingham/Atlanta Geriatric Research Education and Clinical Center, Decatur, Georgia, USA.