*4.6. Statistical Analysis*

The significance of the differences between the two groups was assessed using the unpaired two-tailed Student's *t*-test (Figure 1). Data sets that involved more than two groups were assessed by one-way ANOVA followed by a Turkey's test (Figures 1–4). *p* values and the significance level are indicated in the associated figure legends for each figure. Statistical analysis was performed with SPSS statistics software (Version 19.0).
