2.6. Statistical analysis<br>The data collected were analyzed using the Shapiro-Wilk test which veri!ed the normal distribution of the data sets. After that, comparison among groups was performed using ANOVA test. All signi!cant result from ANOVA (p < 0.05) was analyzed further using Tukey posthoc test for comparison between groups. All an- alyses were performed using the statistical software package SPSS version21. An alpha value of 5% was considered significant, all data are presented as mean ± SD with 95% con!dence intervals
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