1. National Haemophilia Center and Haemostasis Department State Health Center Budapest Hungary
2. Department of Paediatric Haematology Children's University Hospital Brno Czech Republic
3. Department of Pediatrics, Hematology and Oncology Medical University Warsaw Poland
4. Department of Pediatrics University Multiprofile Hospital for Active Treatment “Sveti Georgi” Plovdiv Bulgaria
5. Children's Hospital Vilnius University Hospital Santariskiu Klinikos Vilnius Lithuania
6. Louis Turcanu Timisoara Romania