1. Department of Pathology–Comparative Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
2. Department of Radiology and Biomedical Engineering, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
3. Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
4. Department of Pathology–Comparative Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA. dcaudell@wakehealth.edu