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Flow of patients in our study. ar-tPA: recombinant tissue plasminogen activator. bThrombolysis-only group for patients with intravenous thrombolysis and without endovascular therapy; EVT group for patients with endovascular therapy and with/without intravenous thrombolysis. cExcluded from Cox proportional hazards models because of missing data on patient-level characteristics and follow-up times.
