[1] L Sacco Univ Hosp, Rheumatol Unit, Milan, Italy
[2] Arcispedale S Maria Nuova, Rheumatol Unit, Reggio Emilia, Italy
[3] Arcispedale S Maria Nuova, Lab Biol Mol, Reggio Emilia, Italy
[4] Osped S Carlo, Rheumatol Unit, Potenza, Italy
[5] Osped Misericordia & Dolce, Rheumatol Unit, Prato, Italy
[6] Osped Bellaria, Dipartimento Sci Neurol, Bologna, Italy
[7] Univ Ferrara, Cattedra Reumatol, I-44100 Ferrara, Italy
[8] Univ Palermo, Cattedra Reumatol, Palermo, Italy
[9] Osped Maggiore Niguarda, Rheumatol Unit, Milan, Italy
[10] Osped Santa Chiara, Rheumatol Unit, Trento, Italy