1. Fondazione IRCCS Ca’ Granda; Ospedale Maggiore Policlinico; Angelo Bianchi Bonomi Hemophilia and Thrombosis Center; Milan Italy
2. Dr. von Hauner Children's Hospital, Munich; Medical Center of the University of Munich; Munich Germany
3. Haemophilia Comprehensive Care Centre; Department of Molecular Medicine and Haematology; Faculty of Health Sciences; University of the Witwatersrand and National Health Laboratory Service; Johannesburg South Africa
4. Division of Haematology/Oncology; Department of Paediatrics; Child Health Evaluative Sciences; Research Institute, Hospital for Sick Children; University of Toronto; Toronto ON Canada
5. Hemophilia and Thrombosis Center; Department of Hematology; S. Bortolo Hospital; AULSS 8 Berica Vicenza Italy