1. Department of Pediatrics, Medical College of Wisconsin, Milwaukee;
2. Children's Research Institute, Children's Hospital of Wisconsin, Milwaukee;
3. Blood Research Institute, BloodCenter of Wisconsin, Milwaukee;
4. San Bortolo Hospital, Vicenza, Italy;
5. Coagulation Laboratory, Hamburg, Germany;
6. University of Sheffield, Sheffield, United Kingdom;
7. Istituti di ricovero e cura a carattere scientifico (IRCCS) Foundation Maggiore Hospital, University of Milan, Milan, Italy;
8. Hospital Teresa Herrera, La Coruna, Spain;
9. Inserm, Paris, France;
10. Laboratoire Français du Fractionnement et des Biotechnologies, Lille, France;
11. University of Lille, Lille, France;
12. Leiden University Medical Center, Leiden, The Netherlands;
13. University Medical Center Hamburg-Eppendorf, Department of Pediatric Hematology and Oncology, Hamburg, Germany;
14. University Hospital Skejby, Aarhus, Denmark;
15. Institute of Hematology and Blood Transfusion, Prague, Czech Republic;
16. University of Lund, Malmo, Sweden;
17. Barts and The London, Queen Mary University of London, London, United Kingdom; and
18. Children's Hospital, Birmingham, United Kingdom