1. Department of Medicine, Duke University, Durham, North Carolina.
2. Division of Geriatrics, Duke University, Durham, North Carolina.
3. Center for the Study of Aging and Human Development, Duke University, Durham, North Carolina.
4. Duke Palliative Care, Duke University, Durham, North Carolina.
5. Geriatrics Research, Education and Clinical Center, Veterans Affairs Medical Center, Durham, North Carolina.
6. Duke Divinity School, Duke University, Durham, North Carolina.
7. Department of Biostatistics and Bioinformatics, Duke University, Durham, North Carolina.