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Flow chart illustrating the inclusion of adult patients with acute traumatic subarachnoid hemorrhage and the allocation of these patients into four groups. AIS—abbreviated injury scale, Dx—diagnosis, and SAH—subarachnoid hemorrhage. One, two, and three diagnoses indicated occurrences of one, two, or three other types of intracranial hemorrhage (subdural hematoma, epidural hematoma, or intracerebral hemorrhage).
