highly significantP < 0.01
The data were statistically analyzed using Student's t -test by SPSS 18.0 software, with P < 0.01 considered highly significant differences between two groups (∗∗ P < 0.01, ∗∗∗ P < 0.001). 3.
The data were statistically analyzed using Student's t -test by SPSS 18.0 software, with P < 0.01 considered highly significant differences between two groups (∗∗ P < 0.01, ∗∗∗ P < 0.001). 3.