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(A) representative bands showing the expressions of VEGFR2 and its phosphorylation in ECs; (B) summarized data showing the ratio of p-Flk1/VEGFR2. * p < 0.05, vs. vehicle; +p < 0.05, vs. GSC-EXscon or GSC-Exssc. Data are expressed as mean ± SEM; n = 4/group.
