1. Department of Medical Psychology University Medical Center Hamburg‐Eppendorf Hamburg Germany
2. Department of Medicine/Haematology and Coagulation Disorders, Coagulation Centre Sahlgrenska University Hospital Gothenburg Sweden
3. Ege Haemophilia Centre Izmir Turkey
4. Department of Paediatrics, Haematology Oncology Warsaw Medical University Warsaw Poland
5. Haemophilia Centre Rhein Main (HZRM) Mörfelden‐Walldorf Germany
6. Division of Internal Medicine and Dermatology, Van Creveldkliniek University Medical Center Utrecht Utrecht The Netherlands
7. Haemophilia Centre of La Sapienza University Rome Italy
8. Haemnet London UK
9. Centre for Outcomes and Experience Research in Childhood Health Illness and Disability (ORCHID) Great Ormond Street Hospital for Children NHS Trust London UK