[1] Univ Federico II, Dept Clin Med & Surg, Rheumatol Unit, Via Sergio Pansini 5, I-80131 Naples, Italy
[2] Univ Roma Tor Vergata, Dept Syst Med, Rheumatol Allergol & Clin Immunol, Rome, Italy
[3] Univ Campus Biomed Roma, Unit Allergol Clin Immunol & Rheumatol, Rome, Italy
[4] Univ Aquila, Dept Biotechnol & Appl Clin Sci, Rheumatol Unit, Laquila, Italy
[5] Azienda USL IRCCS Reggio Emilia, Dept Rheumatol, Reggio Emilia, Italy