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Figure 2 Serum angiotensin-converting enzyme (ACE) activity 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). In the first two comparisons, the p value represents both pre- and post-dose results, unless otherwise stated. *p < 0.05 pre-dose versus post-dose. Open bars = pre-dose ACE activity; solid bars = post-dose ACE activity.