Graphical representation of the statistical analysis (Wilcoxon signed-rank test) of differences in elastic fibre amounts, i.e. apa.elast (%), in 10 proportional subunits of the CauF.

<p>The analyses were performed separately for each age group (‘young’ and ‘old’) and are displayed in three different diagrams. Note: Different designs (i.e. intensities of grey colour) of the boxes indicate that the differences between the subunits, or groups of subunits were <i>statistically significant</i>. The amounts of elastic fibres (mean values) are recorded in the boxes arranged in each bar. In each age group, three procedures of comparison were performed (‘Wilcoxon Bars’ 1–3), and are summarised in bar 4 (Summary), as explained in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0128085#pone.0128085.g005" target="_blank">Fig 5</a>.