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Distribution of methylation level (%) for nonadjacent normal-appearing tissue (NN), adjacent normal-appearing tissue (AN), and primary colorectal tumor tissue (T) in (A) SFRP2, (B) TFPI2, (C) NDRG4, and (D) BMP3, respectively.
SFRP2, secreted frizzled-related protein 2; TFPI2, tissue factor pathway inhibitor 2; NDRG4, N-Myc downstream-regulated gene 4; BMP3, bone morphogenic protein 3. *p<0.05.
