1. The Katharine Dormandy Haemophilia Centre & Thrombosis Unit; Royal Free London NHS Foundation Trust; London UK
2. Canterbury Christ Church University; Kent UK
3. Haemophilia Centre Rhine Main; Frankfurt-Moerfelden Germany
4. Haemophilia Centre; Great Ormond Street Hospital for Children NHS Foundation Trust; London UK
5. Coagulation Unit; Karolinska University Hospital; Stockholm Sweden
6. Centre for Rare Disorders; Department of Rare Disorders and Disabilities; Oslo University Hospital; Rikshopitalet Norway
7. Haemophilia treatment centre; University Children's Hospital; Zurich Switzerland
8. The Children's University Hospital; Brussels Belgium
9. Van Creveldkliniek; University Medical Center Utrecht; Utrecht the Netherlands