1 Department of Radiology, University of Michigan - Michigan Medicine, 1500 E. Medical Center Drive, UH B1D502, Ann Arbor, MI 48109-5030. Electronic address: kgaetke@med.umich.edu.
2 Department of Radiology, Johns Hopkins Medicine, Baltimore, Maryland.
3 Tucson Hospitals Medical Education Program, Tucson Medical Center, Tucson, Arizona.
4 Department of Radiology and Biomedical Imaging, San Francisco General and Trauma Hospital, University of California San Francisco Medical Center, San Francisco, California.
5 Department of Radiology, University of Virginia Health System, Charlottesville, VA.
6 Department of Radiology, University of Michigan - Michigan Medicine, 1500 E. Medical Center Drive, UH B1D502, Ann Arbor, MI 48109-5030.