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Volcano plots of differentially expressed circRNAs (A), miRNAs (B) and mRNAs (C) in GEO database. The red dots represent the upregulated genes with P-value < 0.05 and LogFC >1 as the threshold. The blue dots represent the downregulated genes with P-value < 0.05 and LogFC <1 as the cut-off criteria. The grey spots represent genes with no significant difference in expression. LogFC, Log2 (fold change); GEO, Gene Expression Omnibus.
