Figure 4: intracellular ROS level in peritoneal macrophages from 4 groups surfaces. The effect of different surfaces on the intracellular ROS level was determined by flow cytometry analysis at 2 and 7 days. Graph shows collective data (*; Significant at P-value<0.05, **; Significant at P-value<0.01, ***; Significant at P-value<0.001). (n=3)