[1] Univ Pisa, Rheumatol Unit, Pisa, Italy
[2] Azienda Osped Univ Pisana, Clin & Expt Med Dept, Pisa, Italy
[3] Univ Pisa, Dept Clin & Expt Med, Rheumatol Unit, Pisa, Italy
[4] AOUP, Pisa, Italy
[5] Univ Pisa, Pisa, Italy
[6] Pisa Univ Hosp, Diagnost Radiol 2, Dept Diagnost Imaging, Pisa, Italy