Algorithm 1 Cell behaviour algorithm that is iterated for all cells (agents) and for all time-steps of an ABM simulation.

if random_number $\le P_{\mathrm{apoptose}}$ then       Remove cell from simulation       return if random_number $\le P_{\mathrm{migrate}}$ then       Displace cell if random_number $\le P_{\mathrm{grow}}$ then       Develop cell diameter, d, unless $>d_{\max }$       return if random_number $\le P_{\mathrm{divide}}$ then       Create new copy of (mother) cell: (daughter) cell       Half the volume of (mother & daughter) cells