1. University of Cincinnati Medical Center, Department of Radiology , Cincinnati, OH , USA
2. Department of Radiology, Ohio State University Medical Center , Columbus , OH , USA
3. University of Michigan Health Systems, Department of Radiology , Ann Arbor, MI , USA
4. University of Chicago Pritzker School of Medicine, Department of Radiology , Chicago, IL , USA
5. University of Pittsburgh Medical Center, Department of Radiology , Pittsburgh, PA , USA
6. Johns Hopkins Medicine, Department of Radiology , Baltimore, MD , USA