[1] Univ Helsinki, Cent Hosp, Biomedicum Helsinki, Hematol Res Unit, Helsinki, Finland
[2] Univ Helsinki, Cent Hosp, Dept Clin Chem, Helsinki, Finland
[3] Univ Helsinki, Cent Hosp, Dept Med, Div Hematol, Helsinki, Finland
[4] Univ Hosp Olomouc, Dept Hematooncol, Olomouc, Czech Republic
[5] Oulu Univ Hosp, Dept Clin Chem, Inst Diagnost, Oulu, Finland
[6] Univ Helsinki, Cent Hosp, Lab Mol Pathol, HUSLAB, Helsinki, Finland