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Comparative gene expression analysis of miR-34a and miR-21 in pulmonary neuroendocrine subtypes (n = 38). Calculated X-fold expression (2−ΔΔCt – y-axis) is plotted against all four distinct subtypes (x-axis). miR-21 is differentially expressed in carcinoids and high-grade neuroendocrine lung tumors (A). Atypical carcinoids (G2) show a higher miR-34a expression level as compared to G1 and G3 neuroendocrine tumors (B).
