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. 2021 Jan 11;11:461. doi: 10.1038/s41598-020-80601-w

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Correlations between exercise capacity and endothelial function. Data are presented as the correlation coefficient (r) and p < 0.05. Relationship between exercise capacity and endothelial function: (A) The FMD (mm) was positively associated with the 6MWD; (B) The FMD (%) was positively associated with the 6MWD. FMD (mm): absolute values; 6MWD was expressed in meters. The figure was create using SigmaPlot version 11.0, from Systat Software, Inc., San Jose California USA, www.systatsoftware.com.