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Serum-induced impairments of vasorelaxation response to acetylcholine. Results are compared by a two-factor ANOVA, considering exposure and acetylcholine concentration as factors, with a Fisher’s Least Significant Difference test to compare specific concentrations (GraphPad Prism, v 6.0). Asterisks indicate significant difference from control (*p<0.05; **p<0.01, ***p<0.001).
