Best-fit mass-concentration relation derived for the 0.15<z<0.29 LOWZ bin. The solid black line indicates the best-fit result and the turquoise area the 68% confidence intervals. The blue dotted line shows the reference relation from Duffy et al. (2008), whose amplitude we fit in the halo model. The red and green dotted-dashed lines show the relations from Macciò et al. (2008) and Dutton & Macciò (2014), respectively. The black points and the grey area are the results from direct fits to lensing data from Mandelbaum et al. (2008).