[1] Rheumatol Clin, Dept Med & Biol Sci, Udine, Italy
[2] ASST Ctr Traumatol Ortoped G Pini CTO, Dept Rheumatol & Med Sci, Milan, Italy
[3] Univ Pavia, Div Rheumatol, Ist Clin Sci Maugeri, Pavia, Italy
[4] ASST Settelaghi Osped Circolo Fdn Macchi, Dept Internal Med, Rheumatol Unit, Varese, Italy
[5] Univ Verona, Rheumatol Unit, Osped Civile Maggiore, Verona, Italy
[6] IRCSS Osped Sacro Cuore Don Calabria, Rheumatol Unit, Negrar, Italy
[7] Med Univ Vienna, Div Rheumatol, Dept Med 3, Vienna, Austria
[8] Univ Torino, Rheumatol Unit, Dipartimento Sci Med, Turin, Italy
[9] Univ Leeds, Leeds Inst Rheumat & Musculoskeletal Med, Leeds, W Yorkshire, England