1. Brown University School of Public Health, Providence, Rhode Island.
2. Cambia Palliative Care Center of Excellence, University of Washington, Seattle, Washington.
3. Center for Health Policy and Research, Department of Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, Massachusetts.
4. National Hospice and Palliative Care Organization, Alexandria, Virginia.
5. Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.