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Figure 3 Restenosis risk according to treatment allocation and ten prespecified variables. The relative risk for short lesions was undefined, because 0% recurrence was found in the sirolimus-eluting stent (SES) group. No patient with in-stent restenosis of a coil stent (first ST Coil) was included. BA = balloon angioplasty; B/A = balloon/artery ratio; CI = confidence interval; LAD = left anterior descending coronary artery; RE = restenosis.