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Survival curves of mice injected subcutaneously with NIH 3T3 cells expressing EWS/FLI1, EWS/FLI1-PIM3 K69M, and empty vector. Mice were sacrificed when tumors reached a diameter of 1.5 cm; thus, the proportion of mice surviving on a given day is representative of the number of mice without a 1.5-cm tumor.
