Ratio of K$^{\ast0}$ and $\phi$ to charged K measured in the three collision systems, as a function of the cube root of the average charged particle density ($\langle$d$N_{\rm ch}$/d$\eta_{\rm lab}$$\rangle^{1/3}$) measured at mid-rapidity, used as a proxy for the system size. Squares represent K$^{\ast0}$/K, circles refer to $\phi$/K. Statistical uncertainties (bars) are shown together with total (hollow boxes) and multiplicity-uncorrelated (shaded boxes) systematic uncertainties. Measurements in pp at $\sqrt{s}=7$ TeV and Pb-Pb collisions at $\snn=2.76$ TeV are taken from [30] and [33], respectively.