1. Center for Dermatology Research, Department of Dermatology, Wake Forest University School of Medicine, Winston-Salem, NC, USA
2. Department of Radiation Oncology, Wake Forest University School of Medicine, Winston Salem, NC, USA
3. Department of Radiation Oncology, Vanderbilt University Medical Center, Nashville, TN, USA
4. Department of Pathology, Wake Forest University School of Medicine, Winston-Salem, NC, USA