File Name : fig_s1.tif Caption : fig. s1 classical pca scores plot from liver and plasma analysed at esi+ and esi-. coding for the piglet groups: newborns (a), neonates (b) and infants (c). tev = total explained variance. File Name : fig_s2.tif Caption : fig. s2 correlation coefficient heat maps for both esi+ and esi-. the color bars show the absolute values of the correlation coefficient (r2).