Ischemic Attack, TransientStrokeCerebrovascular DisordersBrain IschemiaCarotid StenosisCarotid Artery DiseasesEndarterectomy, CarotidRisk FactorsCerebral InfarctionRecurrenceFollow-Up StudiesEndarterectomyTime FactorsIntracranial ArteriosclerosisProspective StudiesIntracranial EmbolismNeurologyIntracranial Arterial DiseasesCerebral AngiographyCarotid Artery, InternalAspirinIntracranial Embolism and ThrombosisCarotid ArteriesEmbolismAmaurosis FugaxSecondary PreventionAnticoagulantsTomography, X-Ray ComputedVertebrobasilar InsufficiencyPlatelet Aggregation InhibitorsMoyamoya DiseaseTreatment OutcomePredictive Value of TestsCohort StudiesAtrial FibrillationCerebral HemorrhageRetrospective StudiesMagnetic Resonance AngiographyCerebral ArteriesForamen Ovale, PatentRiskDiffusion Magnetic Resonance ImagingRisk AssessmentEmergency Medical ServicesInfarction, Posterior Cerebral ArteryCerebrovascular CirculationWarfarinReflex, BabinskiMigraine DisordersUltrasonography, Doppler, Transcranial