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Figure 1: The effect of bFGF on apoptosis and TM expression of HUVEC exposed to radiation. (a)–(c) Representative images of TUNEL staining of each experimental group. White bar indicates 100 μm. (d) Percentage of Annexin-V/PI double stained apoptotic cells determined by using flow cytometry. (e) The effects of bFGF on the TM expression in the medium of radiation treated HUVEC at different time points. NS, no significance, , NS: no significance. Bars represent mean ± SD from 3 independent experiments.