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. 2017 Jun 30;17:613. doi: 10.1186/s12889-017-4521-3

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© The Author(s). 2017

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. 1 — Mean total physical activity (CPM) during waking hours for (a) boys and (b) girls. Only hours were at least 80% of the study sample was awake and recorded valid data are shown. CPM: counts per minute, DC: Daycare