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Further validation of miRNAs that are significantly downregulated in the serum. The miRNA levels were determined in the serum by qRT-PCR. GRG: GC-resistant group (n=37); GSG: GC-sensitive group (n=39). miRNA expression was normalized to baseline levels in each sample. *P<0.05, **P<0.01 versus the other groups. The data were expressed as the means ± SD.
