[1] Karolinska Inst Huddinge, Dept Med, Div Haematol, Stockholm, Sweden
[2] Karolinska Univ Hosp Huddinge, Haematol Ctr Karolinska, SE-14186 Stockholm, Sweden
[3] Janssen Cilag AB, Sollentuna, Sweden
[4] Boras Hosp, Dept Haematol, Boras, Sweden
[5] Univ Uppsala Hosp, Dept Haematol, Uppsala, Sweden