1. Julius Center for Health Sciences and Primary Care; University Medical Center Utrecht; Utrecht the Netherlands
2. Van Creveldkliniek; University Medical Center Utrecht; Utrecht the Netherlands
3. Paediatric Clinic and Malmö Centre for Thrombosis and Haemostasis; Lund University; Skånes Universitetssjukhus; Malmö Sweden
4. Haemophilia Centre and Haemostasis Unit; St. Sophia Children's Hospital; Athens Greece
5. Department of Haematology; Haemophilia Centre; Great Ormond Street Hospital for Children; Toulouse France
6. Haemophilia Centre; Purpan Hospital; Toulouse France