1. Department of Surgical, Oncological and Stomatological Disciplines, University of Palermo, 90127 Palermo, Italy
2. Department of Medical and Surgical Specialties and Dentistry, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy
3. Faculty of Medicine and Surgery, University of Catania, 90121 Catania, Italy
4. Rheumatology Section, Biomedical Department of Internal Medicine, University Hospital “P. Giaccone”, 90127 Palermo, Italy
5. Faculty of Medicine and Surgery, University of Palermo, 90100 Palermo, Italy
6. Paolo Giaccone University Hospital, 90127 Palermo, Italy