[1] Univ Cagliari, Cagliari, Italy
[2] Univ Siena, I-53100 Siena, Italy
[3] Univ Padua, Dept Med DIMED, Padua, Italy
[4] Univ Ferrara, I-44100 Ferrara, Italy
[5] DIM, Rheumatol Unit, Bari, Italy
[6] Univ Roma La Sapienza, Rheumatol Unit, Dept Internal Med & Med Specialties, I-00185 Rome, Italy
[7] Univ Bari, Rheumatol Unit, Interdisciplinary Dept Med DIM, Bari, Italy
[8] Osp San Camillo, Rome, Italy
[9] Univ Pisa, Pisa, Italy
[10] Univ Roma La Sapienza, I-00185 Rome, Italy