Figure 4: The effects of ethanol extracts of P. kingianum rhizomes on cytokine production. (A) TNF-α level; (B) IL-6 level; (C) IL-10 level. Data are expressed as mean ± SD (n=6). One-way ANOVA followed by Bonferroni post-test was used for statistical comparison between the treatment and control groups. *P<0.05.