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. 2021 Nov 1;12:721949. doi: 10.3389/fgene.2021.721949

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Copyright © 2021 Al-Harazi, Kaya, El Allali and Colak.

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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Unsupervised principal component analyses (PCAs) discriminates samples as tumors and normal controls on GSE23878 (A) and TCGA (B). The red spheres refer to tumors and blue ones for normal controls.