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. 2017 Oct 16;5:2050312117734773. doi: 10.1177/2050312117734773

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 3. — Plasma anti-Xa activity versus prothrombin time (PT). The relationship between PT and the plasma anti-Xa activity in (a) all samples, (b) rivaroxaban, and (c) apixaban using an apixaban calibrator and (d) edoxaban using a rivaroxaban calibrator is shown. The dosage regimens are indicated by black and white dots. The estimated formula with an exponential approximation and the coefficient of determination (R²) is shown.