1. Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
2. Center for Palliative Care, Duke University School of Medicine, Durham, North Carolina.
3. Division of General Internal Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
4. Center for Research on Health Care, University of Pittsburgh, Pittsburgh, Pennsylvania.
5. Institute to Enhance Palliative Care, Section of Palliative Care and Medical Ethics, University of Pittsburgh, Pittsburgh, Pennsylvania.
6. Department of Health Policy Management, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania.