1. Research Center of Systemic Autoimmune and Autoinflammatory Diseases, Rheumatology Unit, Policlinico Le Scotte, University of Siena, Viale Bracci 1, 53100 Siena, Italy
2. Institute of Pediatrics, Università Cattolica Sacro Cuore, Policlinico A. Gemelli, Largo A. Gemelli 8, 00168 Rome, Italy
3. Rheumatology Unit, Department of Clinical and Experimental Medicine, University of Padova, Via Giustiniani 2, 35128 Padova, Italy