Mike Makris1,2, Cedric Hermans3. 1. Department of Infection, Immunity and Cardiovascular disease, University of Sheffield, Sheffield, UK. 2. Sheffield Haemophilia and Thrombosis Centre, Royal Hallamshire Hospital, Sheffield, UK. 3. Hemostasis and Thrombosis Unit, Division of Haematology, Cliniques universitaires Saint-Luc, Université catholique de Louvain (UCLouvain), Brussels, Belgium.