1. A. Bianchi Bonomi Haemophilia and Thrombosis Centre, Department of Medicine and Medical Specialties, University of Milan and IRCCS Maggiore Hospital, Mangiagalli and Regina Elena Foundation, Milan
2. Hemophilia Centre, Department of Hematology, Ferrarotto University Hospital, Catania
3. Hemophilia Centre, Department of Haematology and Cell Biotecnology, Policlinico Umberto I, La Sapienza University, Rome
4. Coagulation disorders Unit, SS Annunziata Hospital, Sassari;
5. Haemophilia Center, Transfusion Medicine Department, Policlinic Hospital, Bari, Italy