[1] Bradford Royal Infirm, Dept Paediat, Bradford, England
[2] Univ Toronto, Hosp Sick Children, Toronto, ON, Canada
[3] Univ Toronto, Dalla Lana Sch Publ Hlth, Toronto, ON, Canada
[4] Queens Univ, Sch Med, Kingston, ON, Canada
[5] St Lawrence Coll, Sch Baccalaureate Nursing, Kingston, ON, Canada
[6] Mansoura Univ, Fac Med, Clin Pathol Dept, Mansoura, Egypt
[7] Med Univ Vienna, Dept Paediat, Vienna, Austria
[8] Royal Free NHS Fdn Hosp, Katharine Dormandy Haemophilia & Thrombosis Ctr, Dept Obstet & Gynaecol, London, England
[9] UCL, Inst Womens Hlth, London, England
[10] Univ Melbourne, Murdoch Childrens Res Inst, Royal Childrens Hosp, Melbourne, Vic, Australia
[11] Univ Bristol, Sch Cellular & Mol Med, Bristol, England
[12] Lab Corp Amer, Burlington, NC USA
[13] Lund Univ, Dept Translat Med, Malmo, Sweden
[14] Univ Belgrade, Fac Med, Clin Ctr Serbia, Clin Hematol, Belgrade, Serbia
[15] New York Presbyterian Hosp, Div Hematol Oncol, Dept Med, Weill Cornell Med, New York, NY USA
[16] Texas Childrens Hosp, Baylor Coll Med, Dept Pathol & Immunol Pediat & Med, Houston, TX 77030 USA