Upper panel: correlation between the s-process indices [hs/Fe] and [ls/Fe] for our sample stars and Magellanic Cloud stars from De Smedt et al. (2014, 2015). Also included are the results of two Galactic s-process enriched stars from Reyniers et al. (2004): IRAS 04296+3429 and IRAS 23304+6147. Galactic objects are represented by blue circles (=strongly-enriched) and a green square (=mildly-enriched), Magellanic Cloud objects are represented by red diamonds. Middle panel: similar to upper panel but for the correlation between the total enrichment in s-process elements [s/Fe] and the [hs/ls] index. The dashed line shows the least-squares fit to all results, the full line shows the fit for all stars except for IRAS 17279-1119 (green square). Lower panel: similar to upper panel but for the correlation between the metallicity [Fe/H] and the [hs/ls] index. For more information, see text.