1. The Laboratoire d'Hématologie and INSERM U. 143, Hôpital Bicêtre, Le Kremlin-Bicêtre, France
2. Haemostasis and Thrombosis Research Unit, Dept of Haematology, Leiden University Hospital, Leiden, The Netherlands
3. The A. Bianchi Bonomi Hemophilia and Thrombosis Center and the Institute of Internal Medicine, IRCCS Ospedale Maggiore and University of Milan, Milan, Italy
4. The Servizio di coagulazione, IRCCS H S Raffaele, Milan, Italy