[1] St James Hosp, Trinity Coll Dublin, Dept Haematol, Dublin 8, Ireland
[2] EBMT Data Off, NL-2300 Leiden, Netherlands
[3] Sheffield Teaching Hosp NHS Fdn Trust, Sheffield, S Yorkshire, England
[4] Univ Lille, CHU Lille, LIRIC, INSERM U995, F-59000 Lille, France