Fig. 3.

Comparisons of plaque structure at $t=1$ for ${\mu }_a=40$ and a ${\mu }_e=20$, ${\sigma }_e=0$, b ${\mu }_e=20$, ${\sigma }_e=30$, c ${\mu }_e=80$, ${\sigma }_e=0$, d ${\mu }_e=80$, ${\sigma }_e=30$. The dotted lines in c and d denote the $f^{\ast }=1-\frac{{\mu }_a}{{\mu }_e}=0.5$ steady-state foam cell density predicted by the ODE model (for a and b, an $f^{\ast }=0$ steady state is predicted)