1. Division of Thrombosis and Haemostasis Department of Haematology University Medical Centre Groningen University of Groningen Groningen The Netherlands
2. Radboud University Medical Center Hemophilia Treatment Centre Nijmegen‐Eindhoven‐Maastricht Nijmegen The Netherlands
3. Enzyre Nijmegen The Netherlands
4. Haemophilia Centre and Thrombosis Unit Royal Free London NHS Foundation Trust London UK