Figure 11

The percentage change of the disease gene expression versus the period of drug intake τ for α = 0.4,0.5,0.6,0.7,0.8, respectively. The change must be significant (say at least 60%) and α must be smaller than the acceptable toxic level. Parameters used: $q_1^u=0.1,{\beta }_1=1,{\gamma }_1=0.04,{\theta }_1^{\overline{u}}=10,{\theta }_1^{\underset{‾}{u}}=2,x\left(0\right)=20;p_1=1;p_2=5;{\lambda }_d=0.3$.