1. Center for Health Services Research in Primary Care, Durham VA Medical Center, Durham, North Carolina.
2. Center for Palliative Care, Durham VA Medical Center, Durham, North Carolina.
3. Department of Medicine, Duke University, Durham, North Carolina
4. Center for the Study of Aging and Human Development, Duke University, Durham, North Carolina
5. Dartmouth Medical School, Hanover, New Hampshire.
6. Department of Sociology, Duke University, Durham, North Carolina
7. Department of Biostatisitcs and Bioinformatics, Duke University, Durham, North Carolina
8. Institute on Care at the End of Life, Duke University, Durham, North Carolina