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. 2017 Dec 12;17:193. doi: 10.1186/s12890-017-0515-2

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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. 5 — Begg’s funnel plots of publication bias for the association between CHI3L1 rs4950928 (a) and CHIA rs10494132 (b) polymorphisms and asthma risk under the recessive models (GG vs. GC + CC; TT vs. TC + CC)