[1] Luigi Villa Fdn, Angelo Bianchi Bonomi Hemophilia & Thrombosis Ctr, Milan, Italy
[2] Fdn IRCCS Ca Gr, Sci Direct, Milan, Italy
[3] Fdn IRCCS Ca Granda Osped Maggiore Policlin, UO Epidemiol, Dipartimento Med Prevent, Milan, Italy
[4] Osped Lodi, Dept Hematol, Lodi, Italy
[5] Osped San Carlo Borromeo Milano, Potenza, Italy