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. 2016 Mar 15;5:335. doi: 10.1186/s40064-016-1952-8

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© Sokai et al. 2016

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.

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Fig. 3 — Rrs (a) and Xrs (b) during a whole breath in the RA (n = 69) and healthy control groups (n = 10) are compared. c Differences between inspiratory and expiratory phases (Δ) in Xrs (ΔXrs) calculated as mean inspiratory values minus mean expiratory values are also compared. Values are mean ± SD (cmH₂O/L/s). *Significant difference (P < 0.05) between inspiratory and expiratory phases by two-way repeated measure ANOVA, followed by Bonferroni test for post hoc analysis. ^#There was a significant interaction in the Rrs curves between the group (either the RA or healthy control) and frequency (P < 0.001)