1. Department of Pediatric Hematology, Immunology and Infectious Diseases Emma Children’s Hospital Academic Medical Center Amsterdam the Netherlands
2. Institute of Experimental Haematology and Transfusion Medicine University Clinic Bonn Bonn Germany
3. Department of Pediatric Oncology and Hematology Erasmus Medical Center Rotterdam the Netherlands
4. Department of Haematology & Oncology and Children's Haemophilia Comprehensive Care Centre Great Ormond Street Children's Hospital & Institute of Child Health London UK
5. Italian Association of Haemophilia Centres (AICE) Florence Italy
6. Department of Oncology Center for Bleeding Disorders Careggi University Hospital Firenze Italy
7. Department of Haematology Royal Adelaide Hospital Adelaide Australia
8. Sanquin Research and Department of Clinical Epidemiology Center for Clinical Transfusion Research Leiden University Medical Center Leiden the Netherlands