Fig. 2From: Different stability of miRNAs and endogenous control genes in archival specimens of papillary thyroid carcinomaDifferences in endogenous controls and target miRNAs degradation rate. a–g Correlation analysis between PTC FFPE tissue sample age and detected RNU48, let-7a, miR-146b, miR-222, miR-21, miR-221, miR-181b cycle of threshold (Ct). h Combined regression lines of miR-146b, miR-222, miR-21, miR-221, miR-181b and control RNU48, let-7a Ct values against sample age. For this graph miR-181b regression line is lowered by 10 CtBack to article page