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. 2020 Mar 4;412(10):2365–2374. doi: 10.1007/s00216-020-02463-5

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 6 — Accuracy assessment for SRM 1950 - “Metabolites in Frozen Human Plasma.” Values are presented as normalized coverage equivalents at the mean (dots) and stdev (error bars, N = 2) of measurements, overlaid onto the consensus mean value (blue line) and uncertainty (95% coverage, green region; 99% coverage, red region). a Fractionated with SFC. b Non-fractionated full extract. See ESM Tables S3 and S4 for detailed results. Graphic is produced with LipidQC [58]