1. Thrombosis and Haemostasis Unit, Department of Paediatric Haematology and Oncology, Giannina Gaslini Children's Hospital, Genova, Italy
2. Department of Child Neuropsychiatry, University of Genoa, Gemoa
3. Service of Epidemiology and Biostatistics, Scientific Directorate
4. Department of Paediatrics I, Laboratory Standardization Verification Screening, Metabolic and Endocrine Disease