1. Department of Haematology Oslo University Hospital Oslo Norway
2. Institute of Clinical Medicine University of Oslo Oslo Norway
3. Haemophilia Reference Centre Bicêtre Hospital AP‐HP University Paris XI Paris France
4. Haemophilia Comprehensive Care Centre Belfast Health and Social Care Trust Belfast UK
5. Centre for Benign Haematology, Thrombosis and Haemostasis, Van Creveldkliniek, University Medical Center Utrecht Utrecht University Utrecht the Netherlands
6. Department of Physiotherapy Institute of Movement Studies University of Applied Science Utrecht the Netherlands
7. Katharine Dormandy Haemophilia Centre and Thrombosis Unit Royal Free London NHS Foundation Trust London UK