Fig. 4.

Representative example of SMC density as a function of the radial coordinate ($\mathit{\rho }$, Fig. 3a). Inner and outer layers of SMCs are clearly visible. Layers were detected by finding the two largest density maxima. The distance between those maxima was defined as $2\mathrm{\Delta }$. SMCs are assumed to be part of the inner/outer layer if they are within a distance of $\mathrm{\Delta }$ from their respective maximum. SMC smooth muscle cell