1. Clinica di Radiologia, Dipartimento di Scienze Radiologiche, Azienda Ospedaliero-Universitaria delle Marche, 60126 Ancona, Italy
2. Radiology Unit, Department of Experimental, Diagnostic and Speciality Medicine, Sant’Orsola Hospital, University of Bologna, Via Albertoni 15, 40138 Bologna, Italy
3. Rheumatology Department, San Giovanni di Dio Hospital, USL Tuscany Center, 50143 Florence, Italy
4. Department of Radiology, “San Carlo” Hospital, 85100 Potenza, Italy
5. Rheumatology Unit, “Carlo Urbani” Hospital, Università Politecnica delle Marche, 60035 Jesi, Italy