1. Laboratory of Nano- and Translational Medicine, Department of Radiation Oncology, Lineberger Comprehensive Cancer Center, University of North Carolina−Chapel Hill, Chapel Hill, North Carolina, United States
2. Carolina Center for Cancer Nanotechnology Excellence, University of North Carolina−Chapel Hill, Chapel Hill, North Carolina, United States
3. Department of Biostatistics and NC TraCS Institute, University of North Carolina−Chapel Hill, Chapel Hill, North Carolina, United States
4. Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, University of North Carolina−Chapel Hill, Chapel Hill, North Carolina, United States
5. Department of Radiation Oncology, Lineberger Comprehensive Cancer Center, University of North Carolina−Chapel Hill, Chapel Hill, North Carolina, United States.