1. Institute of Pediatrics, Policlinico A. Gemelli, Università Cattolica Sacro Cuore, Rome, Italy
2. Interdisciplinary Department of Medicine, Rheumatology Unit, University of Bari, Bari, Italy
3. Research Center of Systemic Autoimmune and Autoinflammatory Diseases, Rheumatology Unit, Policlinico Le Scotte, University of Siena, Viale Bracci 1, 53100 Siena, Italy
4. Division of Pediatric Surgery, Department of Medical Sciences, Surgery, and Neuroscience, University of Siena, Siena, Italy
5. Rheumatology Unit, Department of Clinical Medicine and Surgery, University Federico II, Naples, Italy
6. Department of Medical Sciences, Surgery and Neurosciences, University of Siena, Siena, Italy