extremely significantp < 0.01
An asterisk represented a significant difference ( ∗p < 0.05), and two asterisks represent extremely significant differences ( ∗∗p < 0.01) in the figures.
An asterisk represented a significant difference ( ∗p < 0.05), and two asterisks represent extremely significant differences ( ∗∗p < 0.01) in the figures.