Upper panel: ratio between the fluxes computed by direct summation of our integrated spectra, after correction for foreground galactic extinction, and the (galactic-extinction-corrected) integrated fluxes published by Moustakas & Kennicutt (2006). Lower panel: ratio between equivalent width measurements. To avoid overlapping of error bars (which include the uncertainties on both datasets), datapoints were slightly shifted from their nominal position on the X axis.