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. 2018 Aug 24;24(1):41–54. doi: 10.1007/s10741-018-9734-8

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© The Author(s) 2018

Open Access This 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 — Factors associated with sub-optimal CRT response. Reproduced with permission from Wilfried Mullens and Petra Nijst. Understanding non-response to cardiac resynchronisation therapy; common problems and potential solutions. Journal of the American College of Cardiology. 2017 69(17):2130–2133