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Figure 3 Mean luminal diameter of the left anterior descending coronary artery at baseline (C) and in response to maximal intracoronary acetylcholine infusion (Ach) for all the study patients. BA = balloon angioplasty group; DCA = directional coronary atherectomy group; Stent = stent group. *p = 0.02 versus balloon angioplasty and directional atherectomy groups.