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. 2020 Feb 12;11:90. doi: 10.3389/fmicb.2020.00090

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Copyright © 2020 George, Lucero, Torres, Lagomarcino and O’Ryan.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Clinical samples used to analyze each biomarker (vertical axis), and molecules identified in each case (horizontal axis). Each biomarker identified in this review is represented by a circle. Upper half: biomarkers analyzed in blood or serum. Lower half: biomarkers analyzed in gastric tissue. Right half: Biomarkers identified as proteins. Left half: biomarkers identified as RNA or DNA. Genes (DNA) in which methylation levels were analyzed are surrounded by a dashed rectangle.