1. Division of Medical Oncology; Duke Cancer Institute; Durham North Carolina
2. Duke University School of Nursing; Durham North Carolina
3. Lineberger Comprehensive Cancer Center and the School of Nursing; University of North Carolina; Chapel Hill North Carolina
4. Department of Statistics; Gillings School of Global Public Health, University of North Carolina; Chapel Hill North Carolina
5. Cecil G. Sheps Center for Health Services Research and the School of Social Work, University of North Carolina; Chapel Hill North Carolina
6. Duke Cancer Institute; Durham North Carolina