highly significantP < 0.01
Differences between the two groups were determined to be significant at ∗P < 0.05 and highly significant at ∗∗P < 0.01, ∗∗∗P < 0.001 and ∗∗∗∗P < 0.0001.
Differences between the two groups were determined to be significant at ∗P < 0.05 and highly significant at ∗∗P < 0.01, ∗∗∗P < 0.001 and ∗∗∗∗P < 0.0001.