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. 2017 Jun 30;357:j2835. doi: 10.1136/bmj.j2835

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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions

This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Fig 2 — The abstract on the left is as published.³⁰ The abstract on the right has been amended to comply with the minimum reporting requirements for abstracts shown in table 1, combining the standard checklist item with the extension for within person trials. Added text is shown in red.