*2.6. Statistical Analysis*

The data are expressed as the mean ± SEM. All graphical representations and statistical calculations were aided by GraphPad Prism version 6.01 and Microsoft Excel. The Shapiro–Wilk test was used to check the normal distribution of data. Two-way ANOVA, Tukey's multiple comparisons test, Sidak's multiple comparisons test, and Student's t-test were used to analyze the data.
