Figure 3. The flow cytometry for the CTGF, CD26, and procollagen expression from day 7 to 17. Levels at 14 days post-cisplatin were comparable to levels at 7 days post-saline (a). The statistical analyses were performed using two-way ANOVA with Tukey multiple comparison test. *P < 0.05; **P < 0.01; ***P < 0.001; ****P < 0.0001. The graph shows the levels of procollagen type 1 by flow cytometry were a significant higher expression that was present in the control group compared to the treatment group (P < 0.0001) for each time point (b). There was a statistically difference in procollagen type 1 between the 7 days post-chemotherapy group and the 17 days post-chemotherapy group for each time point (c). CTGF: connective tissue growth factor; ANOVA: analysis of variance.