1. Department of Health Policy and Management; University of North Carolina Gillings School of Global Public Health; Chapel Hill North Carolina
2. Department of Radiation Oncology; University of North Carolina at Chapel Hill; Chapel Hill North Carolina
3. Lineberger Comprehensive Cancer Center; University of North Carolina at Chapel Hill; Chapel Hill North Carolina
4. Cecil G. Sheps Center for Health Services Research; University of North Carolina at Chapel Hill; Chapel Hill North Carolina
5. Department of Radiation Oncology; University of Texas Southwestern Medical Center; Dallas Texas