1. Artroreuma SRL, Outpatient of Rheumatology Accredited with Italian National Health System , Mascalucia , Catania , Italy
2. Department of Clinical and Experimental Medicine , University of Catania , Catania , Italy
3. Department of Experimental and Clinical Medicine , University of Florence , Florence , Italy
4. Department of Radiology , AUSL Romagna “M. Bufalini” Hospital , Cesena , Italy
5. Division of Rheumatology , University and IRCCS “Policlinico San Matteo” Fundation , Pavia , Italy
6. Department of Medicine and Surgery, Section of Radiology , University of Parma , Parma , Italy
7. Department of Medical Surgical Sciences and Advanced Technologies “GF Ingrassia” , University Hospital “Policlinico Vittorio Emanuele”, University of Catania , Catania , Italy
8. Department of Medicine, Internal Medicine and Rheumatology , Azienda Ospedaliero Universitaria di Parma , Parma , Italy