1. The National Haemophilia Centre; University Hospital; Bratislava Slovakia
2. University of Ferrara Medical School; Ferrara Italy
3. Department of Paediatric Haematology; Ege University Hospital; Haemophilia Center; Izmir Turkey
4. National Haemophilia Centre; Banco Municipal de Sangre DC; Caracas Venezuela
5. Department of Paediatric Haematology; Necmettin Erbakan University; Konya Turkey
6. Shiraz University; Haematology Research Center; Shiraz Iran
7. Department of Life Sciences and Biotechnology; University of Ferrara; Ferrara Italy
8. Haematology Unit; University of Palermo; Palermo Italy
9. National Institute of Statistics; Palermo Italy
10. Haemostasis and Thrombosis Centre; Guy's & St Thomas' Hospital; London UK
11. Centre for Haemophilia and Thrombosis; Aarhus University Hospital; Aarhus Denmark