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Intensity of expression of proliferating cell nuclear antigen (PCNA). Cells treated with calreticulin (a–c), AuNPs (d–f), and AuNPs–calreticulin (g–i). The expression of PCNA at day 3 was not affected with treatments used. Significant difference at * p < 0.05, ** p < 0.01 and *** p < 0.0001.
