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. 2017 Dec 6;37(2):363–369. doi: 10.1007/s10096-017-3144-z

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© The Author(s) 2017

Open Access This 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.

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Fig. 2 — Seasonal distribution of the four human coronavirus strains in pediatric patients with acute respiratory tract infection from July 2009 to June 2016. HCoV: human coronavirus; OC43: human coronavirus OC43; 229E: human coronavirus 229E; NL63: human coronavirus NL63; HKU1: human coronavirus HKU1