1. Department of Paediatrics; Bradford Royal Infirmary; Bradford UK
2. Department of Paediatric Haematology and Oncology; University Hospital of Heidelberg; Heidelberg Germany
3. Department of Paediatric Haematology-Oncology; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands
4. Division of Hematology; CHU Ste. Justine; Montreal QC Canada
5. Department of Haematology; Hospital Universitario de la Princesa; Madrid Spain
6. Institute of Experimental Haematology and Transfusion Medicine; University Hospital Bonn; Bonn Germany
7. Department of Paediatric Haematology and Oncology; Children's University Hospital; Münster Germany
8. Paediatric Haemophilia and Blood Coagulation Centre; Dr von Haunersches Kinderspital; University of Munich; Munich Germany
9. Haemophilia Comprehensive Care Centre; Great Ormond Street Hospital; London UK
10. Haematology and Haemotherapy Department; Hospital Universitario Materno Infantil de Canarias; Las Palmas de Gran Canaria Spain
11. Department of Haematology; The Royal Children's Hospital; Department of Paediatrics; University of Melbourne; Melbourne Vic. Australia
12. Department of Paediatric Haematology-Oncology; University Hospital Southampton; Southampton UK
13. Thrombosis and Haemostasis Treatment Centre; Institute of Clinical Chemistry; University Hospital Schleswig-Holstein; Kiel Germany