1. Department of Radiology, Medical University Innsbruck, Innsbruck, Austria
2. Department of Medical Imaging, University of Arizona, College of Medicine, Banner–University Medical Center, Tucson, Arizona
3. Department of Radiology, Nuffield Orthopaedic Centre, Headington, Oxford, United Kingdom
4. Department of Neurology, Medical University Innsbruck, Innsbruck, Austria
5. Cattedra “R” di Radiologia-DICMI, Università di Genova, Genova, Italy