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. 2021 May 11;11:661048. doi: 10.3389/fonc.2021.661048

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Copyright © 2021 Shen, Li, Li, Zhang, Li, Cui, Gao, Chen, Chen and Fang

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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Work flowcharts. HC, healthy control; CRA, colorectal adenoma; LST, laterally spreading tumor; CRC, colorectal carcinoma; qPCR, quantitative polymerase chain reaction.