1. Division of Preventive Medicine, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.
2. Deparment of Community and Family Medicine, Duke University School of Medicine, Durham, North Carolina.
3. Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas.
4. Biostatistics and Bioinformatics, Duke University School of Medicine, Durham, North Carolina.
5. Center for Health Services Research, Durham VA Medical Center, Durham, North Carolina.
6. School of Nursing, University of Alabama at Birmingham, Birmingham, Alabama.
7. Division of Geriatrics, Gerontology, and Palliative Care, School of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.
8. Department of Emergency Medicine, Emory University School of Medicine, Atlanta, Georgia.
9. Division of Geriatrics, Department of Medicine, Center for the Study of Aging and Human Development, Center for Palliative Care Duke University School of Medicine and Geriatrics Research Education and Clinical Center, Durham VA Medical Center, Durham, North Carolina.