[1] Univ Autonoma Madrid, Dept Haematol, P Castellana 261, Madrid 28046, Spain
[2] La Paz Univ Hosp, P Castellana 261, Madrid 28046, Spain
[3] Washington Ctr Bleeding Disorders Bloodworks Nort, Seattle, WA USA
[4] Univ Washington, Seattle, WA 98195 USA
[5] Hampshire Hosp NHS Fdn Trust, Haemophilia Haemostasis &Thrombosis Ctr, Basingstoke, Hants, England
[6] Univ Hosp Vall dHebron, Hemophilia Unit, Barcelona, Spain