1. Center for Health Equity Research and Promotion at the Philadelphia Veterans Affairs Medical Center, University of Pennsylvania, Philadelphia, Pennsylvania.
2. The Division of Geriatric Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.
3. Center for Clinical Epidemiology and Biostatistics, University of Pennsylvania, Philadelphia, Pennsylvania.
4. Section of Palliative Care and Medical Ethics, University of Pittsburgh School of Medicine), Pittsburgh, Pennsylvania.
5. Duke Comprehensive Cancer Center, Duke Department of Family and Community Medicine, Durham, North Carolina.
6. Center for Palliative Care, Duke University Medical Center, Durham, North Carolina.
7. Center for Health Services Research in Primary Care, Durham Veterans Affairs Medical Center, Durham, North Carolina.