[1] Manchester NHS Fdn Trust, Royal Manchester Childrens Hosp, Paediat Bone Marrow Transplant, Manchester, Lancs, England
[2] Univ Med Ctr Rotterdam, Erasmus Med Ctr, Dept Haematol, Canc Inst, Rotterdam, Netherlands
[3] Copenhagen Univ Hosp, Rigshosp, Dept Hematol, Copenhagen, Denmark
[4] Univ Med Ctr Hamburg Eppendorf, Dept Stem Cell Transplantat, Hamburg, Germany