1. Department of Disorders of Hemostasis and Internal Medicine; Institute of Hematology and Transfusion Medicine; Warsaw Poland
2. Queen's Medical Centre; University Hospital; Nottingham UK
3. Servicio de Hematologia - Unidad de Hemofilia; Hospital Vall D'Hebron; Barcelona Spain
4. Thrombosis and Haemostasis Unit; Laikon General Hospital; Athens Greece
5. Servicio Hematologia; Complexo Hospitalario A Coruña; INIBIC. Avenida del Pasaje.; La Coruña Spain
6. Department of Pediatric Hematology; Istanbul University Cerrahpasa Faculty of Medicine; Cerrahpasa; Istanbul Turkey