1. University of Vermont Medical Center and Larner College of Medicine at the University of Vermont, Department of Radiology , Burlington, VT , USA
2. University of Wisconsin–Madison, Department of Radiology , Madison, WI , USA
3. Boston University Medical Center and Boston University School of Medicine, Department of Radiology , Boston, MA , USA
4. NYU Langone–Long Island Hospital and NYU Grossman School of Medicine, Department of Radiology , Mineola, NY , USA