1. Department of Medical Psychology University Medical Centre Hamburg‐Eppendorf Hamburg Germany
2. Coagulation and Thrombosis Centre (GZRR) Duisburg Germany
3. Haemophilia Centre Hildesheim Hildesheim Germany
4. Department of Paediatrics, Haematology and Oncology University Medical Centre Hamburg‐Eppendorf Hamburg Germany
5. II. Medical Department Haemophilia Centre University Medical Centre Hamburg‐Eppendorf Hamburg Germany
6. Paediatric Haemostasis and Thrombosis Unit Department of Paediatrics Paediatric Haemophilia Centre Dr. von Hauner Children's Hospital University HospitalLMU Munich Munich Germany