[1] Danish Canc Soc, Inst Canc Biol, DK-2100 Copenhagen, Denmark
[2] Danish Canc Soc, Ctr Genotox Stress Res, DK-2100 Copenhagen, Denmark
[3] Aarhus Univ Hosp, Dept Clin Biochem, DK-8200 Aarhus, Denmark
[4] Univ Copenhagen Hosp, Dept Pathol, DK-2100 Copenhagen, Denmark
[5] Univ Oslo, Norwegian Radium Hosp, Dept Pathol, N-0310 Oslo, Norway
[6] Acad Sci Czech Republ, Inst Genet Mol, CZ-16637 Prague, Czech Republic