Immunohistochemical analysis of liver tissue samples stained with DAPI staining and Green Fluorescent antibody for PCNA.

<p><b>A</b>. Images of liver samples taken from individual animals within 2 week and 4 week test groups. B. Quantification of PCNA-positive cells. Bars represent the average (with SD) number of PCNA cells. Asterisks show significant differences from control (p<0.05).