[1] Meyer Childrens Hosp IRCCS, ERN ReCONNET Ctr, Rheumatol Unit, Florence, Italy
[2] Santo Stefano Hosp, Paediat & Neonatol Unit, Prato, Italy
[3] Univ Florence, Dept Hlth Sci, Florence, Italy
[4] Univ Florence, NEUROFARBA Dept, Florence, Italy
[5] Meyer Childrens Hosp IRCCS, Rheumatol Unit, Viale Gaetano Pieraccini 24, I-50139 Florence, Italy