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Figure 4 Bar graphs demonstrating the effects on cell proliferation as assessed by PCNA immunohistochemistry. Data (mean ± SEM) are expressed as the number of PCNA-positive cells per section averaged over three sections per artery. N = 6 in each group. *p < 0.005 vs. no treatment or polymer + spermine. PCNA = proliferating cell nuclear antigen. Open box = no injury; solid box = injury.
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