[1] SRH Kurpfalzkrankenhaus, Hemophilia Care Ctr Heidelberg, Dept Internal Med, D-69123 Heidelberg, Germany
[2] Univ Hosp Geneva, Hemostasis Unit, Geneva, Switzerland
[3] Fac Med Geneva, Geneva, Switzerland
[4] Univ Med Ctr Utrecht, Dept Hematol, Van Creveldklin, Utrecht, Netherlands
[5] Univ Nottingham Hosp, Queens Med Ctr, Dept Haematol, Nottingham NG7 2UH, England