[1] Hop St Louis, Inst Hematol, Lab Biol Cellulaire Hematopoiet, Paris, France
[2] Univ Wales Coll Med, Dept Haematol, Cardiff CF4 4XN, S Glam, Wales
[3] Llandough Hosp, Cardiff, S Glam, Wales
[4] Etab Transfus Sanguine & Genet Humaine Haute Norm, Rouen, France