Principal-coordinate analysis-based estimations of β-diversity variation in saliva of individuals with or without caries (Fig. S1); bacterial taxonomic comparisons of saliva samples from individuals with or without caries (Fig. S2); distribution patterns at the species level (Fig. S3); redundancy analysis of the significant influences of the salivary pH, iron concentration, and DMFT index on the bacterial community structure at the species level (Fig. S4); characteristics of individual participants in the study (Table S1); summary of studies on bacterial communities in samples from individuals with or without caries (Table S2); taxonomic assignment of abbreviations in Fig. S4 (Table S3).
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