[1] Osped La Colletta, Div Reumatol, Genoa, Italy
[2] Univ Verona, Rheumatol Unit, I-37100 Verona, Italy
[3] AO Osped Niguarda Ca Granda, Rheumatol Unit, Milan, Italy
[4] Univ Bari Aldo Moro, DIM Sez Reuamtol, Bari, Italy
[5] ASL Taranto, Unita Operat Reumatol, Taranto, Italy
[6] Roche SpA, Monza, Italy
[7] Univ Pisa, Div Reumatol, Pisa, Italy
[8] Univ Bari, DIMIMP Rheumatol Unit, Bari, Italy
[9] IOG Pini, Rheumatol Dept, Milan, Italy
[10] Osped S Anna Ferrara, Ferrara, Italy