Compared with normal results, the diversity index by both species richness (OTU number) and evenness (phylogeny-based Chao1) suggested an increasing trend of microbial diversity in tumors (mean; 122.3 ± 26.8 vs. 155.5 ± 56.8; 178.3 ± 41.0 vs. 230.7 ± 78.1).
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