1. Department of Paediatric Haematology; Erasmus University Medical Centre - Sophia Children's Hospital Rotterdam; Rotterdam The Netherlands
2. Hospital Pharmacy - Clinical Pharmacology; Academic Medical Centre Amsterdam; Amsterdam The Netherlands
3. Great Ormond Street Haemophilia Centre; Great Ormond Street Hospital for Children NHS trust; London UK
4. Katharine Dormandy Haemophilia Centre and Thrombosis Unit; Royal Free London NHS Foundation Trust; London UK
5. Department of Haematology; The Royal London Hospital Barts Health NHS Trust; London UK
6. Oxford Haemophilia and Thrombosis Centre; Oxford University Hospitals; Churchill Hospital; Oxford UK
7. Netherlands Haemophilia Patient Society (NVHP); Nijkerk The Netherlands
8. Department of Haematology; Radboud university medical centre; Nijmegen The Netherlands
9. Department of Thrombosis and Haemostasis; Leiden University Medical Centre; Leiden The Netherlands
10. Department of Haematology; University Medical Centre Groningen; University of Groningen; Groningen The Netherlands
11. Department of Paediatric Haematology; Academic Medical Centre Amsterdam; Amsterdam The Netherlands
12. Department of Haematology; Erasmus University Medical Centre Rotterdam; Rotterdam The Netherlands
13. Arthur Bloom Haemophilia Centre; Institute of Infection and Immunity; School of Medicine; Cardiff University; Cardiff UK