1. Penn Comprehensive Hemophilia and Thrombosis Program; Philadelphia PA USA
2. Angelo Bianchi Bonomi Hemophilia and Thrombosis Center; Fondazione IRCCS Ca’ Granda, Ospedale Maggiore Policlinico; Milan Italy
3. Division of Hematology and Oncology; Hemophilia and Thrombosis Center; University of North Carolina; Chapel Hill NC USA
4. Munich Hemophilia Centre; Munich Germany
5. Children's Hospital of Michigan; Detroit MI USA
6. Royal Free Hospital; London UK
7. Department of Haematology; Oslo University Hospital, Rikshospitalet; Oslo Norway
8. Queen's University; Kingston ON Canada
9. Tulane University School of Medicine; New Orleans LA USA
10. Faculty of Health Sciences; University of the Witwatersrand and Charlotte Maxeke Johannesburg Academic Hospital; Johannesburg South Africa
11. Regional University Hospital Carlos Haya; Malaga Spain
12. Children's Hospital of Orange County; Orange CA USA