Graph 1: (a) Patients in groups 1 and 4 (Figure 1 legend for group descriptions) were significantly correlated with a lower disease-free survival rate (p = 0.005). (b) Patients with tumors that had iNOS activity outside one standard deviation from the mean tended to have a shorter disease-free survival than patients with tumors that had iNOS activity within one standard deviation from the mean (p = 0.059).