197 The plasma cfDNA was demonstrated to show an elevated trend in its concentration with the progression of gastric cancer. 198 And the serum cfDNA expression level of patients with stages III-IV was significantly higher than that of patients with stageI. 199 The role of miRNAs in gastric cancer development has been identified, for example, down-regulation of
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Liquid biopsy in cancer current: status, challenges and future prospects.
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