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Effect of the combination treatment of CI-994 with etoposide on apoptosis in AT/RT cells. (A) Apoptosis in AT/RT cells was analyzed by Annexin V-FITC/propidium iodide assay and flow cytometry. (B) Percentages of apoptotic cells are presented on graphs. Combination of CI-994 with etoposide more considerably induced apoptosis in all AT/RT cells than the single treatment. *p < 0.05, **p < 0.001, ***p < 0.0001.
