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Figure 5 Plasma renin activity (PRA) after high-dose versus low-dose enalapril therapy. Only statistically significant results are reported from the comparisons: 1) between groups; 2) within a group (baseline to end of study); and 3) within a group (pre-dose to post-dose). *p < 0.05 pre-dose versus post-dose. Open bars = pre-dose PRA level; solid bars = post-dose PRA level.