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Figure 5 Plot of time to development of 50% to 99% stenosis in internal mammary artery (IMA) and single saphenous vein graft (SVG) to the left anterior descending coronary artery (LAD). The number of patients at each time point is listed in the figure. *p < 0.001 (IMA vs. single SVG to LAD). CABG = coronary artery bypass grafting.