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. 2022 Dec;11(6):834–847. doi: 10.21037/hbsn-21-116

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2022 Hepatobiliary Surgery and Nutrition. All rights reserved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0.

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COPs intervention in patients affects the serum metabolome. The PCA score plots of total serum samples. TGBSS, treatment group before surgery in serum; CGBSS, control group before surgery in serum; TGASS, treatment group after surgery for 7 days in serum; CGASS, control group after surgery for 7 days in serum; QC, quality control; COPs, corn oligopeptides; PCA, principal component analysis.