1. Department of Paediatric Haematology; Erasmus MC - Sophia Children's Hospital; Rotterdam Netherlands
2. Department of Public Health; Erasmus MC, University Medical Centre Rotterdam; Rotterdam Netherlands
3. Department of Haematology; Indiana Haemophilia and Thrombosis Centre; Indianapolis IN USA
4. Department of Paediatric Haematology; Academic Medical Centre Amsterdam; Amsterdam Netherlands
5. Department of Paediatric Haematology; University Medical Centre Groningen; Groningen Netherlands
6. Department of Haematology; Erasmus MC, University Medical Centre Rotterdam; Rotterdam Netherlands
7. Department of General Paediatrics; Erasmus MC - Sophia Children's Hospital; Rotterdam Netherlands