[1] Beaumont Hosp, Dept Haematol, Beaumont Rd, Dublin D09 V2N0, Dublin, Ireland
[2] Univ Groningen, Univ Med Ctr Groningen, Dept Surg, Surg Res Lab, Groningen, Netherlands
[3] Fdn Luigi Villa, Fdn IRCCS Ca Granda Osped Maggiore Policlin, Angelo Bianchi Bonomi Hemophilia & Thrombosis Ctr, Milan, Italy
[4] Manchester Univ Hosp, Dept Haematol, Oxford Rd, Manchester, England