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Figure 4: Evaluation of the survival fraction of (a) HeLa, (b) MDA-MB-231 cells, and (c) human umbilical vein endothelial cells in response to morphine, single radiation dose of 2 Gy, and a combination of both following 14 days, using colony formation assay. Cells were treated as indicated. Data are mean ± standard deviation where control is set at 100% (n = 3). The asterisks indicate a statistically significant difference versus control, and the hashtags indicate a statistically significant difference of specific dose of morphine + radiation (2 Gy) versus radiation alone (2 Gy) (P ≤ 0.05)

Figure 4: Evaluation of the survival fraction of (a) HeLa, (b) MDA-MB-231 cells, and (c) human umbilical vein endothelial cells in response to morphine, single radiation dose of 2 Gy, and a combination of both following 14 days, using colony formation assay. Cells were treated as indicated. Data are mean ± standard deviation where control is set at 100% (<i>n</i> = 3). The asterisks indicate a statistically significant difference versus control, and the hashtags indicate a statistically significant difference of specific dose of morphine + radiation (2 Gy) versus radiation alone (2 Gy) (<i>P</i> ≤ 0.05)