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Forest plot and Begg's funnel plot of miR-9-3p expression in microarrays from GEO database. (A) Forest plot evaluating differences in miR-9-3p expression between lung adenocarcinoma tissues and normal lung tissues. Experimental group, high miR-9-3p expression; control group, low miR-9-3p expression. (B) Funnel plot for publication bias test of GEO microarrays. CI, confidence interval; GEO, Gene Expression Omnibus; miR, microRNA; s.e., standard error; SMD, standard mean difference.
