Figure 3.

Different cell lines have different growth patterns, and after 72 h of incubation, their numbers differ significantly at every drug concentration. Curves differing only in the amplitude parameter $A_0$ and sharing the remaining three parameters, $b_{\infty }$, $\mathit{logC}$, and $\beta$, were fitted to the empirical data. The different amplitudes were later used for normalizing the curves.