[1] Ist Ortoped Gaetano Pini, Dept Rheumatol, Milan, Italy
[2] ASL3 Azienda Sanit Genovese, Dept Rheumatol, Genoa, Italy
[3] ASST Grande Osped Metropolitano Niguarda, Rheumatol Unit, Milan, Italy
[4] ASL TO4 Osped Ivrea, Dept Rheumatol, Ivrea, Italy
[5] Azienda ICP Milano Presidio Osped E Bassini, Dept Rheumatol, Milan, Italy
[6] OC Vittorio Veneto, Dept Internal Med, Vittorio Veneto, Italy
[7] Ist Ospitalieri Cremona, Azienda Osped, Dept Rheumatol, Cremona, CR, Italy
[8] Osped Regina Apostolorum, Dept Internal Med, Albano Laziale, Italy
[9] Osped Riuniti Papardo Piemonte Messina, Azienda Osped, Dept Rheumatol, Messina, ME, Italy
[10] AO San Gerardo Monza Univ Milano Bicocca, Dept Internal Med, Monza, Italy
[11] ASO Santa Croce & Carle, Dept Rheumatol, Cuneo, Italy
[12] Osped Valduce, Dept Internal Med, Como, Italy
[13] IRCCS Ca Granda Osped Maggiore Policlin Milano, Dept Allergy & Clin Immunol, Milan, Italy