Comparison of N abundances derived in this work with values from previous studies. Different panels present different abundance analysis methods and atmosphere codes (see text). Transparent symbols correspond to stars with discrepant comparisons (beyond uncertainties). Vertical and horizontal dotted lines indicate the CAS values at the solar position (Nieva & Przybilla 2012). The solid and dashed diagonal lines respectively represent the one-to-one relation and the mean relation with respect to the literature (obtained by fitting the consistent stars considering a fixed slope of unity), with the offset between both relations indicated at the top of the figure.