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. 2017 Jul 11;10:266. doi: 10.1186/s13104-017-2587-8

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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. 2 — Sum of case notifications between 1st December and 31st January. a Austria by daily disease onset, winter seasons 2008/2009–2013/2014. b Germany by daily disease onset, winter seasons 2008/2009–2013/2014. c Norway by daily disease onset, winter seasons 2006/2007–2013/2014. d Belgium by daily diagnoses, winter seasons 2011/2012–2012/2013