1. Regional Reference Centre for Coagulation Disorders; Federico II University; Naples; Italy
2. Rheumatology Unit; Federico II University; Naples; Italy
3. Department of Bio-morphological and Functional Sciences; Federico II University; Naples; Italy
4. Department of Hematology; S. Bortolo Hospital; Vicenza; Italy
5. Paediatric Regional Reference Centre for Coagulation Disorders; Santobono-Pausilipon Hospital; Naples; Italy
6. Department of Orthopedic Surgery; Federico II University; Naples; Italy