[1] Karolinska Univ Hosp, Dept Hematol, Stockholm, Sweden
[2] Karolinska Univ Hosp, Dept Med, Stockholm, Sweden
[3] Karolinska Inst, Stockholm, Sweden
[4] Karolinska Univ Hosp, Dept Lab Med, Div Pathol, Stockholm, Sweden
[5] Imperial Coll London, St Marys Hosp, Fac Med, Ctr Haematol, London, England
[6] Karolinska Univ Hosp, Dept Mol Med & Surg, Clin Genet, Stockholm, Sweden