from E(V−X) as given in Tables 4 and 5 versus EWNa i D. The Poznanski et al. (2012) relation is over-plotted as a solid blue line. Empty symbols indicate upper limits on EWNa i D. A linear fit between the two quantities (with intercept fixed to zero) is drawn as a black dashed line and the corresponding fit expression is reported in the top-left corner of the figure. This expression has been obtained by linearly fitting all the points including the limits.
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