1. National Reference Centre of Haemophilia Clinical Haemostasis Unit Hospices Civils de Lyon and Université Claude Bernard Lyon 1 Lyon France
2. Division of Angiology and Haemostasis University Hospitals of Geneva Geneva Switzerland
3. ERN‐EuroBloodNet the European Reference Network on Rare Hematological Diseases Paris France
4. Division of Hematology Cliniques universitaires Saint‐Luc Université Catholique de Louvain (UC Louvain) Louvain Belgium