[1] Univ Helsinki, Cent Hosp, Hematol Res Unit, Biomedicum Helsinki, Helsinki, Finland
[2] Univ Helsinki, Cent Hosp, Dept Clin Chem, HUSLAB, Helsinki, Finland
[3] Univ Helsinki, Cent Hosp, Dept Med, HUSLAB, Helsinki, Finland
[4] Vaasa Cent Hosp, Dept Med, Vaasa, Finland
[5] Tampere Univ Hosp, Dept Genet, Ctr Lab Med, Tampere, Finland
[6] Univ Helsinki, Dept Pathol, HUSLAB, Helsinki, Finland
[7] Univ Helsinki, Haartman Inst, Helsinki, Finland