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Kaplan–Meier curves for the primary endpoint for subgroups according to the baseline medication. (A) Patients treated with angiotensin-converting enzyme inhibitors but not with β-blockers. (B) Patients treated with β-blockers but not with angiotensin-converting enzyme inhibitors. (C) Patients treated with both angiotensin-converting enzyme inhibitors and β-blockers. ACEI, angiotensin-converting enzyme inhibitors; BB, β-blockers.
