Lithium abundances obtained with our 1D LTE analysis (red symbols) and corrected for 3D NLTE effects (violet open symbols) as a function of [Fe/H] for the stars in our sample (top). A representative error bar is plotted in the lower-right corner of the figure. In the lower panel, we compare both 1D LTE and 3D NLTE lithium abundances. The stars CES 1543+0201 and CES 2231–3238 overlap around log N_Li = 1.04 and log N_Li 3D NLTE = 1.07.