1. Department of Paediatrics, Paediatric Haematology and Oncology Pomeranian Medical University in Szczecin Szczecin Poland
2. Institute of Blood Pathology and Transfusion Medicine of the Academy of Medical Sciences of Ukraine Lviv Ukraine
3. Republican Center for Haemophilia Treatment St. Petersburg Russia
4. Prof. Dr. C. T. Nicolau National Institute for Transfusional Hematology Bucharest Romania
5. Regional Clinical Hospital Ekaterinburg Russia
6. Baxter BioScience Westlake Village CA USA
7. Baxter BioScience Vienna Austria