A Boban1,2, S Henrard1,3, C Lambert1, C Hermans1. 1. Haemostasis and Thrombosis Unit, Division of Haematology, Saint-Luc University Hospital, Brussels, Belgium. 2. Haemophilia Unit, Division of Haematology, Department of Internal Medicine, University Hospital Centre Zagreb, Zagreb, Croatia. 3. Institute of Health and Society (IRSS), Université catholique de Louvain, Brussels, Belgium.