[1] IRCCS, Arcispedale S Maria Nuova, Rheumatol Unit, Reggio Emilia, Italy
[2] Univ Ferrara, Dept Med Sci, Rheumatol Unit, Ferrara, Italy
[3] Azienda Osped Univ St Anna, Ferrara, Italy
[4] Univ Fo Modena & Reggio, Rheumatol Unit, Modena, Italy
[5] Santa Maria della Misericordia Univ Hosp, Rheumatol Clin, Dept Med & Biol Sci, Udine, Italy
[6] AUSL Romagna Osped Bufalini, Dipartimento Internist SS Reumatol, Cesena, Italy
[7] St Orsola Marcello Malpighi Hosp, Alma Mater Studiorum, Rheumatol Unit, Dept CardioThorac Vasc, Bologna, Italy
[8] Osped Infermi Rimini, Internal Med & Rheumatol, Rimini, Italy
[9] Osped Paolo Dettori, Internal Med, Tempio Pausania, Italy
[10] Arcispedale S Maria Nuova, Rheumatol Unit, Reggio Emilia, Italy
[11] Univ Ferrara, Rheumatol Clin, Dept Med & Biol Sci, Ferrara, Italy
[12] Santa Maria della Misericordia Univ Hosp, Dept Med Sci, Rheumatol Unit, Udine, Italy
[13] Azienda Osped Univ Bologna, Policlin S Orsola Malpighi, Bologna, Italy