highly significantp < 0.001
( p < 0.05 is a significant difference, represented by ∗, p < 0.01 is a highly significant difference, represented by ∗∗, p < 0.001 is a highly significant difference, represented by ∗∗∗).
( p < 0.05 is a significant difference, represented by ∗, p < 0.01 is a highly significant difference, represented by ∗∗, p < 0.001 is a highly significant difference, represented by ∗∗∗).