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Figure 2 Randomized comparison of ACEi versus no-ACEi on 30-day mortality in (poor-average prognosis) patients who were not given ASA and in (good-average prognosis) patients who were given ASA. Note that although ASA must have been responsible for some benefit, differences in prognosis between patients may well be responsible for more than half of the difference in outcome between ASA and no-ASA in this Figure.