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Figure 2: Effects of varying concentrations of caffeine on aortic rings precontracted with norepinephrine 10-4 (n = 10). *P > 0.05

Figure 2: Effects of varying concentrations of caffeine on aortic rings precontracted with norepinephrine 10-4 (<i>n</i> = 10). *<i>P</i> > 0.05