1. Section of Palliative Medicine, Division of General Internal Medicine, Department of Medicine, Johns Hopkins Hospital, Baltimore, Maryland, USA.
2. Johns Hopkins University School of Nursing, Baltimore, Maryland, USA.
3. Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
4. Division of Geriatric Medicine and Gerontology, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA.
5. Division of General Internal Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland, USA.
6. Division of Palliative Medicine, Barnes Jewish Hospital, Goldfarb School of Nursing, Washington University, St Louis, Missouri, USA.