1. Diagnostic and Interventional Neuroradiology Unit, S. Orsola University Hospital
2. Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna
3. Radiology Unit, Department of Experimental, Diagnostic and Specialty Medicine, S. Orsola University Hospital and
4. Medicine & Rheumatology Unit, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy