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Figure 2 Effects of three-day NTG treatment of rabbits (continuous or 12 h patch on/patch off) on concentration–constriction curves generated in vitro with angiotensin II (Ang II), phenylephrine (Phe), serotonin (5-HT) and potassium chloride (KCl). Data are presented as the mean values ± SEM of 10 to 12 experiments. See Figure 1 legend for explanation of symbols.