[1] Lund Univ, Dept Clin Sci, Pediat, Lund, Sweden
[2] Skane Univ Hosp, Dept Thrombosis & Hemostasis, Malmo, Sweden
[3] Capital Med Univ, Natl Ctr Childrens Hlth, Beijing Childrens Hosp, Hematologyoncol Ctr, Beijing, Peoples R China
[4] Hosp Sick Children, Res Inst, Div Haematol Oncol & Child Hlth Evaluat Sci, Toronto, ON, Canada
[5] Chu Purpan Pav Ctr Hosp Lefebvre, Ctr Reg Hemophilie, Toulouse, France
[6] Univ Bern, Wabern & Childrens Hosp, Hamophiliezentrum, Bern, Switzerland
[7] Great Ormond Hosp Children NHS Trust, Haemophilia Ctr, London, England
[8] Univ Helsinki, Helsinki Univ Hosp, Childrens Hosp & Haematol, Helsinki, Finland
[9] Karolinska Inst, Dept Womens & Childrens Hlth, Childhood Canc Res Unit, Solna, Sweden
[10] Karolinska Univ Hosp, Astrid Lindgren Childrens Hosp, Stockholm, Sweden