Fig. 5.

the distribution of five DD parameters including (a) ${\epsilon }_{\mathrm{\infty }}$ , (b) ${\epsilon }_s$ , (c) ${\epsilon }_2$ , (d) ${\tau }_1$ , and (e) ${\tau }_2$ within each group over the entire sample set. The horizontal back lines over each sub-plot shows a statistically-significant (p<0.05) difference between any two groups using a specific parameter. For example, the horizontal line between H and PT groups in (b) means that the difference between the ${\epsilon }_s$ values of all samples in H and PT categories is statistically significant.