[1] Univ Uppsala Hosp, Dept Haematol, Uppsala, Sweden
[2] Linkoping Univ Hosp, S-58185 Linkoping, Sweden
[3] Univ Umea Hosp, S-90185 Umea, Sweden
[4] Univ Lund Hosp, S-22185 Lund, Sweden
[5] Sahlgrens Univ Hosp, Gothenburg, Sweden
[6] Karolinska Univ Hosp, Stockholm, Sweden