1. Angelo Bianchi Bonomi Hemophilia and Thrombosis Center, Fondazione Istituto Di Ricovero e Cura a Carattere Scientifico Ca’Granda Ospedale Maggiore Policlinico and Luigi Villa Foundation, Milan, Italy;
2. Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy; and
3. Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands