1. Division of General Internal Medicine, Department of Medicine, Palliative Medicine Section, Johns Hopkins Hospital, Baltimore, MD, USA
2. Johns Hopkins School of Nursing, Baltimore, MD, USA
3. Department of Family and Community Medicine, University of Missouri, Medical Sciences Building, Columbia, MO, USA
4. Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
5. Harry J. Duffey Family Professor of Palliative Medicine, JHMI, Johns Hopkins Hospital, Baltimore, MD, USA