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. 2018 Oct 25;13(10):e0205707. doi: 10.1371/journal.pone.0205707

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© 2018 Löfgren et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 5 — Comparing STOP and STOPx2 performance in conservation of exogenous ¹³C₁₀-¹⁵N₅-adenosine (A) and measured endogenous adenosine concentrations (B) Venous blood was collected into blood collection tubes pre-filled with STOP and STOPx2 containing 100 nmol/L ¹³C₁₀-¹⁵N₅-adenosine final blood concentrations. Plasma was prepared at 4, 15 and 30 min after blood collection. Data expressed as means ± SD, n = 5.