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CD40 and CD40 ligand (CD40L) localization in endarterectomy plaques. CD40 and CD40L immunoreactivity was found in particular in the shoulder (A, B) and cap (C, D) regions. Squares in insets mark enlarged plaque regions. Scale bars are 50 μm (far left and right image columns), 20 μm (middle column), and 1 mm (insets, far left column) (n=22 plaques).
