[1] Villa San Benedetto Menni Hosp, Hermanas Hosp, Dept Clin Neurosci, Como, Italy
[2] Humanitas Clin & Res Ctr, Milan, Italy
[3] Univ Messina, Dept Clin & Expt Med, Rheumatol Unit, Via C Valeria 1, I-98100 Messina, Italy
[4] Santissima Trinita Hosp, Trauma & Orthopaed Unit, Cagliari, Italy
[5] ASST Fatebenefratelli Sacco, Internal Med Dept, Rheumatol Unit, Milan, Italy
[6] Univ Sch Med, Milan, Italy