[1] UCL, London, England
[2] Royal Free NHS Trust, KD Haemophilia Ctr, London, England
[3] Royal Free NHS Trust, Thrombosis Unit, London, England
[4] Stanford Univ, Sch Med, Stanford, CA 94305 USA
[5] St Jude Childrens Hosp, Childrens GMP, LLC, Memphis, TN 38105 USA
[6] Childrens Hosp Philadelphia, Ctr Cellular & Mol Therapeut, Philadelphia, PA 19104 USA
[7] St Jude Childrens Hosp, Dept Surg, Memphis, TN 38105 USA