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Kaplan‐Meier showing the recurrence rates in the 4 groups of patients: (1) MES −ve and MRIPH−ve; (2) MES+, and MRIPH−; (3) MES−ve and MRIPH +ve, and (4) MES+ve and MRIPH+ve. CEA indicates carotid endarterectomy; MES, microembolic signals; MRIPH, plaque hemorrhage detected by magnetic resonance imaging.
