MKI67 and neoplasm: Figure 5C,D show that the elevated proliferative activity in the untreated tumor (Fig. 5C left panel, mouse 12.1, Fig. 5D green symbols) was reduced after RT (Fig. 5C central panel, mouse 27.13, Fig. 5D black symbols) (27.13 vs 12.1 mean difference: −25% of KI67+ cells, 95% CI of difference −18 to −32%).