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Cell viability of brain tumor cell lines; (A) SJGBM2, (B) CHLA200, (C) U87 and (D) CHLA266 exposed to free temozolomide, free epirubicin or the mixture of temozolomide and epirubicin treatment. Data is presented as percent of non-treated control cells +/− SEM. #p<0.05 compared to control, *p<0.05 combined drug treatment compared to free epirubicin.
