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Determining whether symptoms of suspected stroke are a result of ischemic stroke (treatable with thrombolytic therapy) or intracerebral hemorrhage currently requires a CT scan. Because bringing portable CT scanners to the prehospital setting via mobile stroke units remains a challenge, a blood biomarker panel that can reliably distinguish between ischemic stroke and intracerebral hemorrhage could be very useful and easier to implement. To evaluate the performance of various blood biomarker candidates, investigators analyzed available blood samples from consecutive patients with suspected stroke presenting to a single center for four candidate biomarkers: Glial fibrillary acid protein (GFAP), retinol binding protein 4 (RBP-4), N-terminal pro…