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. 2019 Oct 29;20:397. doi: 10.1186/s12882-019-1584-7

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Measured aGFR [(mGFR/BSA) per 1.73m²] on the x-axis and the (a) CKD-EPI estimated and (b) approximated GFR on the y-axis. Black diamonds represent estimations by the CKD-EPI equation and open squares represent approximating equations by new equation. There is better agreement between the measured aGFR and the approximated GFR than there is using the estimating equation CKD-EPI