1. University of Groningen; University Medical Center Groningen; Groningen The Netherlands
2. Bayer HealthCare Pharmaceuticals; Berlin Germany
3. IRCCS Ca' Granda Foundation Maggiore Hospital Policlinico; Angelo Bianchi Bonomi Haemophilia and Thrombosis Centre; Milan Italy
4. Aghia Sophia Children's Hospital; Athens Greece
5. Van Creveldkliniek; University Medical Center Utrecht; Utrecht The Netherlands
6. Bayer HealthCare Pharmaceuticals; Leverkusen Germany
7. SSCVD Mal. Trombotiche/Emorragiche; Molinette University Hospital; Turin Italy