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. 2022 Apr 20;38(2):147–161. doi: 10.1007/s12550-022-00456-0

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Fig. 2 — Correlation between serum levels of blood donors in Switzerland 2019 for phase I and phase II (2–9 months apart), a) OTA (236 subjects ≥ LOQ at both sampling points), b) 2′R-OTA (108 subjects ≥ LOQ at both sampling points)