Afterwards, she affiliated with Ludwig Institute for Cancer Research, Toronto, Canada, receiving a postdoctoral degree on June 5, 2001, on the basis of the dissertation entitled "Utlenianie i alkilacja zasad DNA - rola pierwotnych i wtórnych uszkodzeń w replikacji i mutagenezie" ("Oxidation and alkylation of DNA bases - the role of primary and secondary damage in replication and mutagenesis").