Fig. 9.

a Comparison for time to fight the cancer cells. The blue and red lines represent the strong immune system without anisotropic collagen orientation (with the response time $t_1$) and with anisotropic collagen orientation (with the response time $t_2$), respectively. Furthermore, the corresponding confidence intervals are shown in b. The light blue and brown lines denote the confidence intervals of strong immune systems in the tumor islets without anisotropic collagen orientation ($k=0$) as well as with anisotropic collagen orientation ($k=0.3$), respectively