Fig. 4From: Combining a noble gas with radiotherapy: glutamate receptor antagonist xenon may act as a radiosensitizer in glioblastoma(A): Surviving fraction (SF) of HeLa cells irradiated with 2–8 Gy and treated with xenon (Xe). Error bars indicate 95% confidence interval. Significant reduction in SF was found for Xe at a dose of 8 Gy (*t-test p < 0.05). (B): Linear-quadratic regression analysis. Error bars indicate standard error of mean. Data are given as means of at least three independent experiments and were normalised to plating efficiency. Non-normalised data are shown in the appendix (Supplementary Fig. 3)Back to article page