1. Department of Paediatric Haematology, Immunology and Infectious Diseases; Emma Children's Hospital; Academic Medical Centre; Amsterdam The Netherlands
2. Department of Radiology; Academic Medical Centre; Amsterdam The Netherlands
3. Department of Paediatric Neurology; Emma Children's Hospital; Academic Medical Centre; Amsterdam The Netherlands
4. Department of Clinical Chemistry and Haematology; University Medical Centre; Utrecht The Netherlands
5. Department Immunopathology and Blood Coagulation; Sanquin Diagnostic Services; Amsterdam The Netherlands
6. Department of Neurology; Academic Medical Centre; Amsterdam The Netherlands
7. Department of Paediatric Oncology and Haematology; Sophia Children's Hospital; Erasmus Medical Centre; Rotterdam The Netherlands