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(a) The tumour mass at 
for the 2-dimensional model as a function of the phenotypic switching rates 
(the rate at which cells become proliferative) and 
(the rate at which they become motile). (b) The tumour mass at 
for the 3-dimensional as a function of 
and 
. The results in 2 and 3 dimensions are similar, although a larger variability seems to exists in the 3-dimensional case.
