1 Department of Medical Imaging, Banner University Medical Center Tucson, The University of Arizona, College of Medicine, Tucson, AZ. Electronic address: mihrat@radiology.arizona.edu.
2 Department of Medical Imaging, Banner University Medical Center Tucson, The University of Arizona, College of Medicine, Tucson, AZ.
3 Department of Radiology, Medical University Innsbruck, Section Rheumatology and Sports Imaging, Innsbruck, Austria.
4 Department of Radiology, University of Washington, Seattle, WA.
5 Northwestern University Feinberg School of Medicine, Chicago, IL.