[1] Univ Helsinki, Cent Hosp, Dept Oncol, Helsinki, Finland
[2] Univ Helsinki, Biomed Helsinski, Mol Canc Biol Res Program, Helsinki, Finland
[3] Univ Helsinki, Haartman Inst, Dept Pathol, Helsinki, Finland
[4] Univ Uppsala Hosp, Dept Oncol, S-75185 Uppsala, Sweden
[5] Univ Uppsala, Univ Uppsala Hosp, Dept Genet & Pathol, Uppsala, Sweden