Kennicutt-Schmidt relation between the gas surface density and the SFR surface density for the galaxies of our sample (filled black dots), compared to the galaxies from Gao & Solomon (2004, filled green triangles), and from Genzel et al. (2010, blue asterisks). The full line corresponds to a depletion time of 100 Myr, and the dash line to 1 Gyr. A common conversion factor of α = 0.8 has been adopted here. The arrow indicates the direction and extent that all points will move, were an MW conversion factor to be used.