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. 2018 Sep 10;18:181. doi: 10.1186/s12872-018-0916-z

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© The Author(s). 2018

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. 3 — Kaplan-Meier survival curves for 1-year all-cause death by the cut off values for (a) fT3, b fT4 and (c) fT3/fT4 ratio (high fT3 group: fT3>3.685 pmol/L and low fT3 group: fT3 ≤ 3.685 pmol/L; high fT4 group: fT4 ≥ 14.21 pmol/L and low fT4 group: fT4<14.21 pmol/L; high fT3/fT4 ratio group: fT3/fT4 ratio>0.255 and low fT3/fT4 ratio group: fT3/fT4 ratio ≤ 0.255)