1. Department of Haematology University College London Hospital London UK
2. Haemostasis Research Unit University College London London UK
3. Medilys Laboratory Coagulation Asklepios Hospital Altona Hamburg Germany
4. Haemophilia Comprehensive Care Centre Great Ormond Street Hospital for Children NHS Trust London UK
5. NIHR Great Ormond Street Hospital Biomedical Research Centre London UK
6. Department of Haematology University College London Hospital Cardiometabolic Programme‐NIHR UCLH/UCL BRC London UK
7. Department of Hematology and Central Hematology Laboratory Inselspital Bern University Hospital University of Bern Bern Switzerland
8. Center for Thrombosis and Hemostasis University Medical Center Mainz Mainz Germany