1. Section of Palliative Care and Medical Ethics, Division of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
2. Department of Population Health Sciences, Duke University School of Medicine, Durham, North Carolina.
3. Duke Cancer Institute, Durham, North Carolina.
4. School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
5. Cecil G. Sheps Center for Health Services Research, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina.
6. Division of Geriatric Medicine & Palliative Care Program, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina.
7. School of Nursing, University of Alabama at Birmingham, Birmingham, Alabama.
8. Division of General Internal Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
9. Health Sciences Library System, University of Pittsburgh, Pittsburgh, Pennsylvania.
10. Division of Palliative Care, University Health Network, Toronto, Ontario, Canada.
11. School of Medicine, University of Toronto, Toronto, Ontario, Canada.