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The 18-year effect of bypass surgery compared with medical therapy on survival, incidence of myocardial infarction, and relief of angina was evaluated in 686 randomized patients with stable angina in the Veterans Affairs Cooperative Study of Coronary Artery Bypass Surgery.

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Eighteen-year follow-up in the Veterans Affairs Cooperative Study of Coronary Artery Bypass Surgery for stable angina. The VA Coronary Artery Bypass Surgery Cooperative Study Group.