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Effects of 125I seed irradiation on apoptosis in esophageal fibroblasts. Fibroblasts were treated with (A) 0, (B) 11.1, (C) 22.2 and (D) 33.3 MBq 125I seed irradiation. Apoptotic rates of fibroblasts were then determined using flow cytometry with Annexin V/PI staining. (E) Quantification of the apoptotic rates of fibroblast following irradiation treatment. Values are presented as the mean ± standard deviation. *P<0.05 vs. 0 MBq. FITC, fluorescein isothiocyanate; PI, propidium iodide.
