Fig. 11From: Metabolome and microbiome of chronic periapical periodontitis in permanent anterior teeth: a pilot studyHeatmap of correlation between major metabolites and relative abundance of major microorganisms in periapical periodontitis. Metabolite and microbial data were clustered using Spearman’s correlation analysis. The correlation (R) value is expressed in different colors in the figure. The legend on the right is the color range of different R values. *p < 0.05Back to article page