1. Department of Pediatrics, Immunology and Rheumatology Section; University of Pisa; Pisa Italy
2. Orthopedic Division; University of Pisa; Pisa Italy
3. Department of Diagnostic Radiology; University of Pisa; Pisa Italy
4. Division of Diagnostic and Interventional Radiology; University of Pisa; Pisa Italy
5. Department of Pathology; University of Pisa; Pisa Italy