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. 2016 Dec 21;4:e2785. doi: 10.7717/peerj.2785

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©2016 Bureš et al.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

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The plots show the estimated marginal means (WHO-5) for Time*Education level*Group. (A) Education level = University. (B) Education level = High school.