1. Department of Paediatric Oncology, Medical University of Warsaw, Haematology, Clinical Transplantology and Paediatrics, Warsaw, Poland
2. Department of Paediatric Hematology and Oncology, University Hospital Motol, Prague, Czech Republic
3. Morozovskaya Children’s Hospital, Moscow, Russian Federation
4. National Research Centre for Hematology, Moscow, Russian Federation
5. Department of Disorders of Haemostasis, SBALHZ - EAD, Sofia, Bulgaria
6. Department of Clinical Haematology in Haemorrhagic Diathesis and Anaemia, Specialized Hospital for Active Treatment “Joan Pavel”, Sofia, Bulgaria
7. Institute of Experimental Haematology and Transfusion Medicine, University Clinic Bonn, Bonn, Germany
8. Haemophilia Centre Rhine Main GmbH, Hessenring 13a, Geb. G, Mörfelden-Walldorf, 64546, Germany