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Representative agarose gel electrophoresis results of the methylation-specific polymerase chain reaction assay for ZIC1, HOXD10 and RUNX3 in plasma DNA (A, ZIC1; B, HOXD10; C, RUNX3). ZIC1, Zinc finger of the cerebellum 1; HOXD10, Homeobox D10; RUNX3, runt-related transcription factor 3; NC, normal control; IM, intestinal metaplasia; IN, intraepithelial neoplasia; GC, gastric cancer; M: Methylated-specific primers; U: Unmethylated-specific primers.
