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. 2016 Nov 3;16:836. doi: 10.1186/s12885-016-2882-0

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© The Author(s). 2016

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. 4 — Analysis of sensitivity and publication bias. a For comparison of SAA level between lung cancer and healthy individuals, exclusion of studies on an individual basis did not substantially modify the estimators; b Z value of the Egger test was −1.42 (Pr > |z| = 0.25), implied that there was no publication bias for these studies