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(A) Dose - dependent relaxant effects of RF contracted by PE on rat aortic rings with endothelium (+ E) or without endothelium (- E). Data are expressed as mean ± SD, (n=6); * p < 0.05 vs. + E, ** p < 0.01 vs. + E(B). Dose - dependent relaxant effects of RF contracted by KCl on rat aortic rings with endothelium (+ E) or without endothelium (- E). Data are expressed as mean ± SD, (n=6); (** p < 0.01 vs. + E).
