1 Division of Healthcare Engineering, Department of Radiation Oncology, University of North Carolina School of Medicine, Chapel Hill, NC; Lineberger Comprehensive Cancer Center, University of North Carolina Hospitals, Chapel Hill, NC. Electronic address: bchera@med.unc.edu.
2 Division of Healthcare Engineering, Department of Radiation Oncology, University of North Carolina School of Medicine, Chapel Hill, NC.
3 Division of Healthcare Engineering, Department of Radiation Oncology, University of North Carolina School of Medicine, Chapel Hill, NC; Lineberger Comprehensive Cancer Center, University of North Carolina Hospitals, Chapel Hill, NC.