1 Department of Radiology, Wake Forest Baptist Medical Center, Wake Forest University School of Medicine, Medical Center Blvd., Winston-Salem, 27157, NC, USA. pwhitwor@wakehealth.edu.
2 Department of Radiology, Perelman School of Medicine, Hospital of the University of Pennsylvania, 3400 Spruce St., Philadelphia, 19104, PA, USA.
3 Department of Radiology, Wake Forest Baptist Medical Center, Wake Forest University School of Medicine, Medical Center Blvd., Winston-Salem, 27157, NC, USA.