Statistical analyses were carried out using SigmaStat 3.0.1a for
Windows (Systat Software, Inc., San Jose CA). The Kolmogorv–Smirnov
test was used to test for normality, and a one-way ANOVA was
performed among sample points with α=0.05. When warranted, the
Tukey test was used for post hoc multiple comparisons. If data sets
were not normally distributed, a Kruskal–Wallis One-Way Analysis of
Variance on Ranks Test and Dunn's Test were used to determine
significance. Unless otherwise noted, results are presented as sample
mean±standard deviation.