1 IRCCS Ca' Granda Foundation Maggiore Policlinico Hospital, Milan, Italy, and the Department of Pathophysiology and Transplantation, University of Milan, Italy.
2 Department of Clinical Epidemiology and the Department of Thrombosis and Haemostasis, Leiden University Medical Center, Leiden, The Netherlands.
3 European Haemophilia Consortium, Brussels, Belgium.
4 Scientific Direction, IRCCS Ca' Granda Foundation Maggiore Policlinico Hospital, Milan, Italy.