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ABCB1 immunoreactivity in control cases (A–E) and patients with traumatic brain injury (TBI) (F–I). ABCB1 was identified colorimetrically using diaminobenzidine (brown), and sections were counterstained with hematoxylin. (A) Control 6. (B–E) Control 7. (F) TBI patient 8. (G–I) TBI patient 6. Images were taken at 40×; highlighted are nonvascular immunoreactive cells (arrows).
