1. Van Creveldkliniek; University Medical Center; Utrecht The Netherlands
2. Dr. von Haunersches Children's Hospital; University of Munich; Munich Germany
3. Haemophilia Center; Department of Haematology; Great Ormond Street Hospital for Children; London UK
4. Department of Clinical Sciences Lund - Paediatrics and Malmö Haemostasis & Thrombosis Centre; Lund University; Skåne University Hospital; Malmö Sweden
5. Department of Haematology Oncology; Our Lady's Children's Hospital; Crumlin Dublin Ireland
6. Paediatric Department of Coagulation Disorders; Karolinska University Hospital; Stockholm Sweden
7. Julius Center for Health Sciences and Primary Care; University Medical Center; Utrecht The Netherlands