1. Immuno-Haematology and Transfusion Medicine, Center for Congenital Bleeding Disorders, Cesena General Hospital, 47521 Cesena, Italy
2. Hemostasis and Thrombosis Unit, Azienda Ospedaliero Universitaria Dulbecco, 88100 Catanzaro, Italy
3. Thrombosis and Hemostasis Unit, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy