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. 2019 Jul 5;20:401. doi: 10.1186/s13063-019-3489-y

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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. 3 — Development and evaluation process for decision aids for people considering trial participation. Adapted from the Medical Research Council (MRC) guidance on developing and evaluating complex interventions and the Model Development Process for Decision Aids (Coulter et al. 2013 [19], Craig et al. 2008 [25]).