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Case Control Study
©The Author(s) 2025.
World J Gastrointest Oncol. Sep 15, 2025; 17(9): 109777
Published online Sep 15, 2025. doi: 10.4251/wjgo.v17.i9.109777
Figure 1
Figure 1 Extracted ion chromatograms of internal standards in all quality control samples. A: Extracted ion chromatogram (EIC) plot of internal standards in positive for all quality control (QC) samples; B: EIC plot of internal standards in negative ions for all QC samples.


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