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The Stability of Circulating RNAs in cDNA Storage at -20 ºC for 3 Months (A), and after, repetitive freeze-thaw (FT) cycles (B). The results are presented as raw Ct values. The detection of small RNAs was performed by qRT-PCR. The mean ± SD of three, independent experiments are shown. Independent student t-test revealed a statistical significance (*P ≤ 0.05)
