[1] ARNAS Garibaldi, Dept Med, Rheumatol Unit, Catania, Italy
[2] Dept Emergency Urgency Unit, Emergency Unit, Messina, Piedmont, Italy
[3] Univ Messina, Dept Clin & Expt Med, Internal Med Unit, Messina, Italy
[4] Univ Catania, Dept Clin & Expt Med, Catania, Italy
[5] Univ Messina, Dept Clin & Expt Med, Allergy & Clin Immunol Unit, Messina, Italy
[6] Univ Modena & Reggio Emilia, Dept Internal Med, Rheumatol Unit, AUSL IRCCS Reggio, Modena, Reggio Emilia, Italy