1. Hemophilia Centre Rhein‐Main – HZRM Frankfurt‐Mörfelden Germany
2. Department of Comprehensive Care in Haemostasis and Thrombosis Professor Hess Children's Hospital Bremen Germany
3. Department of Pediatrics and Adolescent Medicine Centre for Hemostasis University Hospital Frankfurt Frankfurt Germany
4. Department of Paediatric Haemostasis University Children's Hospital Munich Germany
5. Center of Haemostasis Leipzig Germany
6. Department for Internal Medicine, Vascular Medicine and Haemostaseology Vivantes Klinikum Berlin Germany
7. Institute of Experimental Hematology and Transfusion Medicine University Clinic Bonn Bonn Germany