Results are reported as mean values with their standard deviation (SD) or standard error (SEM) as appropriate. Data were analyzed using one-way ANOVA. Levene's test was applied to verify the homogeneity of the variances. Tamhane's T2 (equal variances not assumed) or Bonferroni (equal variances assumed) post hoc tests were used to determine differences within groups (P < 0.05). Analyses were performed using the IBM SPSS Statistics 21 (SPSS Inc., an IBM Company).