Clonogenicity after combined treatment with 5-aza-dC and resveratrol. Clonogenic survival of three medulloblastoma cell lines was determined after treatment with 5-aza-dC and/or resveratrol relative to the untreated control. Surviving fractions from at least two separate experiments done in sextuplicates are depicted and mean values ± SEM are presented. Statistical significance of treated versus untreated (control) is indicated by asterisks: *, p ≤ 0.05. Differences between 5-aza-dC and combinatorial treatments are depicted as bracket: n.s. non-significant.