2.8. Statistics
We used the Past Statistics Package (http://folk.uio.no/
ohammer/past/index.html) to statistically analyze the
data. Parametric data as multiple means were analyzed
by one way analysis of variance followed by the least significant
difference test [42]. Non-parametric data were
subjected to Mann–Whitney-U-test [42], whereas frequency
data were analyzed by the Fisher’s exact probability
test [43]. The accepted level of statistical significance was
at p < 0.05.