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. 2019 Dec 4;10:373. doi: 10.1186/s13287-019-1486-4

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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. 12 — Twitch tracings under spontaneous beating. Representative twitch tracings of hCM-only control hECT (a) and hCSC-supplemented hECT (b); arrows point to measurements performed for each pair of consecutive twitches, PP_n = time to previous, and PP_n + 1 = time to next. Corresponding Poincaré plots show the clustering of values according to the difference between each twitch in the time domain for hCM-only control hECTs (c) and hCSC-supplemented hECTs (d)