1. Division of General Internal Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
2. Division of General Internal Medicine, Section of Palliative Care and Medical Ethics, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
3. Palliative Research Center, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
4. University of Pittsburgh School of Nursing, Pittsburgh, Pennsylvania, USA.
5. Division of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
6. Albert Einstein Cancer Center, Albert Einstein College of Medicine, Bronx, New York, USA.
7. Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
8. Division of General Internal Medicine, Section of Palliative Medicine, Johns Hopkins University School of Medicine and Sidney Kimmel Comprehensive Cancer Center, Baltimore, Maryland, USA.