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Figure 3 Comparison of angiotensin receptor blockers versus controls on hospitalization for HF. Controls were either placebo or angiotensin-converting enzyme inhibitors. Odds ratios (OR) and the 95% confidence intervals (CI) are shown on a logarithmic scale, with box size proportional to the sample size. The diamond represents the pooled effect. Acronyms as in Abbreviations and Acronyms box.