1. Department of Health Policy and Management, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
2. RTI International, Research Triangle Park, North Carolina.
3. Departments of Global Health and Health Services, University of Washington, Seattle, Washington.
4. Division of Geriatric Medicine, Palliative Care Program, Cecil Sheps Center for Health Services Research, The University of North Carolina, Chapel Hill, North Carolina.
5. Lineberger Comprehensive Cancer Center, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.