Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:[8,11] In general, patients with straight sinus thrombosis present with acute headache, nausea, vomiting, seizures, altered mental status, focal neurologic deficits, coma, and/or death because of venous infarction of the bilateral thalami and basal ganglia.[6] Typical MRI findings are high signal intensity and swelling of the bilateral thalami, internal capsules, and basal ganglia on T2WI and FLAIR.
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