1. The Haemostasis Unit, Cardiovascular Line, IRCCS Maggiore Hospital and University of Milano, Italy
2. Biotechnology Department, R & D, Farmitalia Carlo Erba, Erbamont Group, IRCCS Maggiore Hospital and University of Milano, Italy
3. Angelo Bianchi Bonomi, Haemophilia and Thrombosis Center and Institute of Internal Medicine, IRCCS Maggiore Hospital and University of Milano, Italy